Dermatology

Psoriasis patients with symptoms of psychological distress and depression reported lower satisfaction with their clinicians than did those without mental health comorbidities, according to a retrospective analysis of survey data.

The findings highlight the importance of clinicians being supportive and adaptable in their communication style when interacting with psoriasis patients with mental illness.

“This study aims to evaluate whether an association exists between a patient’s psychological state and the perception of patient-clinician encounters,” wrote Charlotte Read, MBBS, of Imperial College London, and April W. Armstrong, MD, MPH, of the University of Southern California, Los Angeles, in JAMA Dermatology.

The researchers retrospectively analyzed longitudinal data from over 8.8 million U.S. adults (unweighted, 652) with psoriasis who participated in the Medical Expenditure Panel Survey from 2004 to 2017. The nationally representative database includes various clinical information, such as data on patient demographics, health care use, and mental health comorbidities.

The primary outcome, patient satisfaction with their physician, was assessed using a patient-physician communication composite score. Mental health comorbidities were evaluated using standard questionnaires.

The mean age of study patients was 52.1 years (range, 0.7 years), and most were female (54%). In all, 73% of participants had no or mild psychological distress symptoms, and 27% had moderate or severe symptoms.

After analysis, the researchers found that patients with moderate psychological distress symptoms were 2.8 times more likely to report lower satisfaction with their physician than were those with no or mild symptoms (adjusted odds ratio, 2.8; P = .001). They also reported that patients with severe symptoms were more likely to report lower satisfaction (aOR, 2.3; P = .03).

“Patients with moderate or severe depression symptoms were less satisfied with their clinicians, compared with those with no or mild depression symptoms,” they further explained.

Based on the results, the coinvestigators emphasized the importance of bettering the patient experience for those with mental illness given the potential association with improved health outcomes.

“Because depressed patients can be more sensitive to negative communication, the clinician needs to be more conscious about using a positive and supportive communication style,” they recommended.

The authors acknowledged the inadequacy of evaluating clinician performance using patient satisfaction alone. As a result, the findings may not be generalizable to all clinical settings.

The study was funded by the National Psoriasis Foundation. Dr. Armstrong reported financial affiliations with several pharmaceutical companies.

SOURCE: Read C, Armstrong AW. JAMA Dermatol. 2020 May 6. doi: 10.1001/jamadermatol.2020.1054.

Psoriasis patients with symptoms of psychological distress and depression reported lower satisfaction with their clinicians than did those without mental health comorbidities, according to a retrospective analysis of survey data.

The findings highlight the importance of clinicians being supportive and adaptable in their communication style when interacting with psoriasis patients with mental illness.

“This study aims to evaluate whether an association exists between a patient’s psychological state and the perception of patient-clinician encounters,” wrote Charlotte Read, MBBS, of Imperial College London, and April W. Armstrong, MD, MPH, of the University of Southern California, Los Angeles, in JAMA Dermatology.

The researchers retrospectively analyzed longitudinal data from over 8.8 million U.S. adults (unweighted, 652) with psoriasis who participated in the Medical Expenditure Panel Survey from 2004 to 2017. The nationally representative database includes various clinical information, such as data on patient demographics, health care use, and mental health comorbidities.

The primary outcome, patient satisfaction with their physician, was assessed using a patient-physician communication composite score. Mental health comorbidities were evaluated using standard questionnaires.

The mean age of study patients was 52.1 years (range, 0.7 years), and most were female (54%). In all, 73% of participants had no or mild psychological distress symptoms, and 27% had moderate or severe symptoms.

After analysis, the researchers found that patients with moderate psychological distress symptoms were 2.8 times more likely to report lower satisfaction with their physician than were those with no or mild symptoms (adjusted odds ratio, 2.8; P = .001). They also reported that patients with severe symptoms were more likely to report lower satisfaction (aOR, 2.3; P = .03).

“Patients with moderate or severe depression symptoms were less satisfied with their clinicians, compared with those with no or mild depression symptoms,” they further explained.

Based on the results, the coinvestigators emphasized the importance of bettering the patient experience for those with mental illness given the potential association with improved health outcomes.

“Because depressed patients can be more sensitive to negative communication, the clinician needs to be more conscious about using a positive and supportive communication style,” they recommended.

The authors acknowledged the inadequacy of evaluating clinician performance using patient satisfaction alone. As a result, the findings may not be generalizable to all clinical settings.

The study was funded by the National Psoriasis Foundation. Dr. Armstrong reported financial affiliations with several pharmaceutical companies.

SOURCE: Read C, Armstrong AW. JAMA Dermatol. 2020 May 6. doi: 10.1001/jamadermatol.2020.1054.

Psoriasis patients with symptoms of psychological distress and depression reported lower satisfaction with their clinicians than did those without mental health comorbidities, according to a retrospective analysis of survey data.

The findings highlight the importance of clinicians being supportive and adaptable in their communication style when interacting with psoriasis patients with mental illness.

“This study aims to evaluate whether an association exists between a patient’s psychological state and the perception of patient-clinician encounters,” wrote Charlotte Read, MBBS, of Imperial College London, and April W. Armstrong, MD, MPH, of the University of Southern California, Los Angeles, in JAMA Dermatology.

The researchers retrospectively analyzed longitudinal data from over 8.8 million U.S. adults (unweighted, 652) with psoriasis who participated in the Medical Expenditure Panel Survey from 2004 to 2017. The nationally representative database includes various clinical information, such as data on patient demographics, health care use, and mental health comorbidities.

The primary outcome, patient satisfaction with their physician, was assessed using a patient-physician communication composite score. Mental health comorbidities were evaluated using standard questionnaires.

The mean age of study patients was 52.1 years (range, 0.7 years), and most were female (54%). In all, 73% of participants had no or mild psychological distress symptoms, and 27% had moderate or severe symptoms.

After analysis, the researchers found that patients with moderate psychological distress symptoms were 2.8 times more likely to report lower satisfaction with their physician than were those with no or mild symptoms (adjusted odds ratio, 2.8; P = .001). They also reported that patients with severe symptoms were more likely to report lower satisfaction (aOR, 2.3; P = .03).

“Patients with moderate or severe depression symptoms were less satisfied with their clinicians, compared with those with no or mild depression symptoms,” they further explained.

Based on the results, the coinvestigators emphasized the importance of bettering the patient experience for those with mental illness given the potential association with improved health outcomes.

“Because depressed patients can be more sensitive to negative communication, the clinician needs to be more conscious about using a positive and supportive communication style,” they recommended.

The authors acknowledged the inadequacy of evaluating clinician performance using patient satisfaction alone. As a result, the findings may not be generalizable to all clinical settings.

The study was funded by the National Psoriasis Foundation. Dr. Armstrong reported financial affiliations with several pharmaceutical companies.

SOURCE: Read C, Armstrong AW. JAMA Dermatol. 2020 May 6. doi: 10.1001/jamadermatol.2020.1054.

Pityriasis rubra pilaris (PRP) is the name given to a heterogeneous group of rare inflammatory papulosquamous dermatoses. There are six sub-types that can present with various skin findings, however, the cardinal features across sub-types include well-defined, red-orange hued plaques with varying scale, palmoplantar keratoderma, and follicular keratosis. In the more generalized subtypes, there is a characteristic feature of intervening areas of unaffected skin often referred to as “islands of sparing.” The plaques may cover the entire body or just parts of the body such as the elbows and knees, palms and soles. Lesions are generally asymptomatic; occasionally patients complain of mild pruritus. 

Photos courtesy of Robert Silverman, MD

The etiology and pathophysiology of this group of disorders is not well understood. However, there are several hypotheses including dysfunction in vitamin A metabolism, autoimmune dysregulation, as well as environmental and immunologic triggers such as infection and ultraviolet exposure. Although most cases are sporadic, genetics do seem to play a role in the development of some cases. Caspase recruitment domain-containing protein 14 (CARD14) mutations are seen in familial PRP, and occasionally in patients with sporadic PRP, with gain of function mutations. Interestingly, CARD14 mutations are also associated with psoriasis in some individuals.¹ The type-VI PRP variant has been associated with HIV, although this is incredibly rare in pediatrics.²

PRP shows significant clinical diversity, with six subtypes defined by age of onset, distribution, and appearance of lesions, and presence of HIV. This includes type I (classical adult onset), type II (atypical adult onset), type III (classical juvenile onset), type IV (circumscribed juvenile onset), type V (atypical juvenile onset), and type VI (HIV-associated). As mentioned earlier, shared features that appear across subtypes in variable degrees include red-orange papules and plaques, hyperkeratotic follicular papules, and palmoplantar hyperkeratosis.

Of the six subtypes, type III, IV, and V occur in the pediatric population. Type III, classic juvenile PRP, typically occurs within the first 2 years of life or in adolescence. Only 10% of cases fall into this category. It shares similar features to type I PRP including red-orange plaques; islands of sparing, perifollicular hyperkeratotic papules; waxy palmoplantar keratoderma; and the distribution of affected skin is more diffuse overall. While some children clear within a few years, more recent studies stress a more prolonged course similar to the type IV variant.²

Type-IV PRP, also known as circumscribed juvenile PRP, is a focal variant, usually seen in prepubertal children and making up 25% of total cases. Clinically, these patients tend to have sharply demarcated grouped erythematous, follicular papules on the elbows, knees and over bony prominences.²

Type-V PRP is an atypical generalized juvenile variant which affects 5% of patients. It is a non-remitting hereditary condition with classic characteristics similar to type III with additional scleroderma-like changes involving the palms and soles.²

Diagnosis of PRP is based on clinical recognition and biopsy can be important to secure a diagnosis.

PRP, in many cases is self-limited and asymptomatic, and therefore does not necessarily require treatment. In other patients treatment can be challenging, and referral to a pediatric dermatology specialist is reasonable. Most practitioners recommend combination therapy with topical agents (emollients, topical corticosteroids, tazarotene, topical calcineurin inhibitors, and keratolytic agents such as urea, salicylic acid, or alpha-hydroxy acids) for symptomatic management and systemic therapies (methotrexate, isotretinoin) aimed at reducing inflammation. There is some data that CARD14-associated PRP can respond well to targeted biologic therapies.¹

The subtypes of PRP can present in a myriad of ways and often the disease is misdiagnosed. Depending on the particular subtype and findings present, the differential can vary considerably. Commonly, physicians need to consider: psoriasis, seborrheic dermatitis, atopic dermatitis, ichthyoses, and other conditions which can cause erythroderma.³ The characteristic red-orange color and variable associated edema helps to distinguish keratoderma of PRP from psoriasis, atopic dermatitis, ichthyosis, and hereditary palmoplantar keratoderma. Scalp involvement of PRP should be differentiated from the waxy scale of seborrheic dermatitis and the well demarcated silvery scale of psoriasis. History alone may assist in distinguishing PRP from other major causes of generalized erythroderma, although biopsy is warranted in these cases.
 

Dr. Eichenfield is chief of pediatric and adolescent dermatology at Rady Children’s Hospital–San Diego. He is vice chair of the department of dermatology and professor of dermatology and pediatrics at the University of California, San Diego. Dr. Tracy is a research fellow in pediatric dermatology at Rady Children’s Hospital-San Diego and the University of California, San Diego. They have no relevant financial disclosures. Email them at [email protected].

References

1. J Am Acad Dermatol. 2018 Sep;79(3):487-94.

2. “Pityriasis Rubra Pilaris” (Treasure Island, Fla.: StatPearls Publishing, July 20, 2019). 3. JAMA Dermatol. 2016 Jun 1;152(6):670-5.

Pityriasis rubra pilaris (PRP) is the name given to a heterogeneous group of rare inflammatory papulosquamous dermatoses. There are six sub-types that can present with various skin findings, however, the cardinal features across sub-types include well-defined, red-orange hued plaques with varying scale, palmoplantar keratoderma, and follicular keratosis. In the more generalized subtypes, there is a characteristic feature of intervening areas of unaffected skin often referred to as “islands of sparing.” The plaques may cover the entire body or just parts of the body such as the elbows and knees, palms and soles. Lesions are generally asymptomatic; occasionally patients complain of mild pruritus. 

Photos courtesy of Robert Silverman, MD

The etiology and pathophysiology of this group of disorders is not well understood. However, there are several hypotheses including dysfunction in vitamin A metabolism, autoimmune dysregulation, as well as environmental and immunologic triggers such as infection and ultraviolet exposure. Although most cases are sporadic, genetics do seem to play a role in the development of some cases. Caspase recruitment domain-containing protein 14 (CARD14) mutations are seen in familial PRP, and occasionally in patients with sporadic PRP, with gain of function mutations. Interestingly, CARD14 mutations are also associated with psoriasis in some individuals.¹ The type-VI PRP variant has been associated with HIV, although this is incredibly rare in pediatrics.²

PRP shows significant clinical diversity, with six subtypes defined by age of onset, distribution, and appearance of lesions, and presence of HIV. This includes type I (classical adult onset), type II (atypical adult onset), type III (classical juvenile onset), type IV (circumscribed juvenile onset), type V (atypical juvenile onset), and type VI (HIV-associated). As mentioned earlier, shared features that appear across subtypes in variable degrees include red-orange papules and plaques, hyperkeratotic follicular papules, and palmoplantar hyperkeratosis.

Of the six subtypes, type III, IV, and V occur in the pediatric population. Type III, classic juvenile PRP, typically occurs within the first 2 years of life or in adolescence. Only 10% of cases fall into this category. It shares similar features to type I PRP including red-orange plaques; islands of sparing, perifollicular hyperkeratotic papules; waxy palmoplantar keratoderma; and the distribution of affected skin is more diffuse overall. While some children clear within a few years, more recent studies stress a more prolonged course similar to the type IV variant.²

Type-IV PRP, also known as circumscribed juvenile PRP, is a focal variant, usually seen in prepubertal children and making up 25% of total cases. Clinically, these patients tend to have sharply demarcated grouped erythematous, follicular papules on the elbows, knees and over bony prominences.²

Type-V PRP is an atypical generalized juvenile variant which affects 5% of patients. It is a non-remitting hereditary condition with classic characteristics similar to type III with additional scleroderma-like changes involving the palms and soles.²

Diagnosis of PRP is based on clinical recognition and biopsy can be important to secure a diagnosis.

PRP, in many cases is self-limited and asymptomatic, and therefore does not necessarily require treatment. In other patients treatment can be challenging, and referral to a pediatric dermatology specialist is reasonable. Most practitioners recommend combination therapy with topical agents (emollients, topical corticosteroids, tazarotene, topical calcineurin inhibitors, and keratolytic agents such as urea, salicylic acid, or alpha-hydroxy acids) for symptomatic management and systemic therapies (methotrexate, isotretinoin) aimed at reducing inflammation. There is some data that CARD14-associated PRP can respond well to targeted biologic therapies.¹

The subtypes of PRP can present in a myriad of ways and often the disease is misdiagnosed. Depending on the particular subtype and findings present, the differential can vary considerably. Commonly, physicians need to consider: psoriasis, seborrheic dermatitis, atopic dermatitis, ichthyoses, and other conditions which can cause erythroderma.³ The characteristic red-orange color and variable associated edema helps to distinguish keratoderma of PRP from psoriasis, atopic dermatitis, ichthyosis, and hereditary palmoplantar keratoderma. Scalp involvement of PRP should be differentiated from the waxy scale of seborrheic dermatitis and the well demarcated silvery scale of psoriasis. History alone may assist in distinguishing PRP from other major causes of generalized erythroderma, although biopsy is warranted in these cases.
 

Dr. Eichenfield is chief of pediatric and adolescent dermatology at Rady Children’s Hospital–San Diego. He is vice chair of the department of dermatology and professor of dermatology and pediatrics at the University of California, San Diego. Dr. Tracy is a research fellow in pediatric dermatology at Rady Children’s Hospital-San Diego and the University of California, San Diego. They have no relevant financial disclosures. Email them at [email protected].

References

1. J Am Acad Dermatol. 2018 Sep;79(3):487-94.

2. “Pityriasis Rubra Pilaris” (Treasure Island, Fla.: StatPearls Publishing, July 20, 2019). 3. JAMA Dermatol. 2016 Jun 1;152(6):670-5.

Pityriasis rubra pilaris (PRP) is the name given to a heterogeneous group of rare inflammatory papulosquamous dermatoses. There are six sub-types that can present with various skin findings, however, the cardinal features across sub-types include well-defined, red-orange hued plaques with varying scale, palmoplantar keratoderma, and follicular keratosis. In the more generalized subtypes, there is a characteristic feature of intervening areas of unaffected skin often referred to as “islands of sparing.” The plaques may cover the entire body or just parts of the body such as the elbows and knees, palms and soles. Lesions are generally asymptomatic; occasionally patients complain of mild pruritus. 

Photos courtesy of Robert Silverman, MD

The etiology and pathophysiology of this group of disorders is not well understood. However, there are several hypotheses including dysfunction in vitamin A metabolism, autoimmune dysregulation, as well as environmental and immunologic triggers such as infection and ultraviolet exposure. Although most cases are sporadic, genetics do seem to play a role in the development of some cases. Caspase recruitment domain-containing protein 14 (CARD14) mutations are seen in familial PRP, and occasionally in patients with sporadic PRP, with gain of function mutations. Interestingly, CARD14 mutations are also associated with psoriasis in some individuals.¹ The type-VI PRP variant has been associated with HIV, although this is incredibly rare in pediatrics.²

PRP shows significant clinical diversity, with six subtypes defined by age of onset, distribution, and appearance of lesions, and presence of HIV. This includes type I (classical adult onset), type II (atypical adult onset), type III (classical juvenile onset), type IV (circumscribed juvenile onset), type V (atypical juvenile onset), and type VI (HIV-associated). As mentioned earlier, shared features that appear across subtypes in variable degrees include red-orange papules and plaques, hyperkeratotic follicular papules, and palmoplantar hyperkeratosis.

Of the six subtypes, type III, IV, and V occur in the pediatric population. Type III, classic juvenile PRP, typically occurs within the first 2 years of life or in adolescence. Only 10% of cases fall into this category. It shares similar features to type I PRP including red-orange plaques; islands of sparing, perifollicular hyperkeratotic papules; waxy palmoplantar keratoderma; and the distribution of affected skin is more diffuse overall. While some children clear within a few years, more recent studies stress a more prolonged course similar to the type IV variant.²

Type-IV PRP, also known as circumscribed juvenile PRP, is a focal variant, usually seen in prepubertal children and making up 25% of total cases. Clinically, these patients tend to have sharply demarcated grouped erythematous, follicular papules on the elbows, knees and over bony prominences.²

Type-V PRP is an atypical generalized juvenile variant which affects 5% of patients. It is a non-remitting hereditary condition with classic characteristics similar to type III with additional scleroderma-like changes involving the palms and soles.²

Diagnosis of PRP is based on clinical recognition and biopsy can be important to secure a diagnosis.

PRP, in many cases is self-limited and asymptomatic, and therefore does not necessarily require treatment. In other patients treatment can be challenging, and referral to a pediatric dermatology specialist is reasonable. Most practitioners recommend combination therapy with topical agents (emollients, topical corticosteroids, tazarotene, topical calcineurin inhibitors, and keratolytic agents such as urea, salicylic acid, or alpha-hydroxy acids) for symptomatic management and systemic therapies (methotrexate, isotretinoin) aimed at reducing inflammation. There is some data that CARD14-associated PRP can respond well to targeted biologic therapies.¹

The subtypes of PRP can present in a myriad of ways and often the disease is misdiagnosed. Depending on the particular subtype and findings present, the differential can vary considerably. Commonly, physicians need to consider: psoriasis, seborrheic dermatitis, atopic dermatitis, ichthyoses, and other conditions which can cause erythroderma.³ The characteristic red-orange color and variable associated edema helps to distinguish keratoderma of PRP from psoriasis, atopic dermatitis, ichthyosis, and hereditary palmoplantar keratoderma. Scalp involvement of PRP should be differentiated from the waxy scale of seborrheic dermatitis and the well demarcated silvery scale of psoriasis. History alone may assist in distinguishing PRP from other major causes of generalized erythroderma, although biopsy is warranted in these cases.
 

Dr. Eichenfield is chief of pediatric and adolescent dermatology at Rady Children’s Hospital–San Diego. He is vice chair of the department of dermatology and professor of dermatology and pediatrics at the University of California, San Diego. Dr. Tracy is a research fellow in pediatric dermatology at Rady Children’s Hospital-San Diego and the University of California, San Diego. They have no relevant financial disclosures. Email them at [email protected].

References

1. J Am Acad Dermatol. 2018 Sep;79(3):487-94.

2. “Pityriasis Rubra Pilaris” (Treasure Island, Fla.: StatPearls Publishing, July 20, 2019). 3. JAMA Dermatol. 2016 Jun 1;152(6):670-5.

Kawasaki disease

Given the presentation of persistent fever, nonpurulent conjunctivitis, cracked lips, erythematous tongue, desquamating perianal rash, and acral edema and erythema, suspicion was high for Kawasaki disease (KD). An echocardiogram revealed diffuse dilation of the left anterior descending artery without evidence of an aneurysm. The patient was promptly started on 2 g/kg IVIG and high-dose aspirin. She was later transitioned to low-dose aspirin. Long-term follow-up thus far has revealed no cardiac sequelae.

KD, or mucocutaneous lymph node syndrome, is a multisystem vasculitis with predilection for the coronary arteries that most commonly affects children between 6 months and 5 years of age.¹ While the etiology remains unclear, the pathogenesis is thought to be the result of an immune response to an infection in the setting of genetic susceptibility.¹ Approximately 90% of patients have mucocutaneous manifestations, highlighting the important role dermatologists play in the diagnosis and early intervention to prevent cardiovascular morbidity.

The diagnostic criteria include fever for at least 5 days accompanied by at least four of the following:

• Bilateral bulbar conjunctival injection without exudate that is classically limbal sparing.
• Oral mucosal changes with cracked fissured lips, “strawberry tongue,” or erythema of the lips and mucosa.
• Changes in the extremities: erythema, swelling, or periungual peeling.
• Polymorphous exanthem.
• Cervical lymphadenopathy, often unilateral (greater than 1.5 cm).

Courtesy Dr. Elizabeth H. Cusick and Dr. Molly E. Plovanich, department of dermatology at the University of Rochester (N.Y.)

Although nonspecific for diagnosis, laboratory abnormalities are common, including anemia, thrombocytosis, leukocytosis, elevated inflammatory markers, elevated alanine aminotransferase (ALT), hypoalbuminemia, and sterile pyuria on urine analysis.¹

Notably, a classic finding of KD is perineal dermatitis with desquamation occurring in the acute phase of disease in 80%-90% of patients.^2-5 In a retrospective review, up to 67% of patients with KD developed a perineal rash in the first week, most often beginning in the diaper area.² The perineal rash classically desquamates early during the acute phase of the disease.¹

While most individuals with KD follow a benign disease course, it is the most common cause of acquired heart disease in the United States.¹ Treatment is aimed at decreasing the risk of developing coronary abnormalities through the prompt administration of IVIG and high-dose aspirin initiated early in the acute phase.⁶ A second dose of IVIG may be given to patients who remain febrile within 24-48 hours after treatment.⁶ Infliximab has been used safely and effectively in patients with refractory KD.⁷ Long-term cardiac follow-up of KD patients is recommended.

Recently, there has been an emerging association between COVID-19 and pediatric multi-system inflammatory syndrome, which shares features with KD. Patients with pediatric multi-system inflammatory syndrome who meet clinical criteria for KD should be promptly treated with IVIG and aspirin to avoid long-term cardiac sequelae.

This case and the photos were submitted by Dr. Elizabeth H. Cusick and Dr. Molly E. Plovanich, both with the department of dermatology at the University of Rochester (N.Y.). Dr. Donna Bilu Martin edited the case.

Dr. Bilu Martin is a board-certified dermatologist in private practice at Premier Dermatology, MD, in Aventura, Fla. More diagnostic cases are available at mdedge.com/dermatology. To submit a case for possible publication, send an email to [email protected].

References

1. Bayers S et al. (2013). J Am Acad Dermatol. 2013 Oct;69(4):501.e1-11.

2. Friter BS and Lucky AW. Arch Dermatol. 1988 Dec;124(12):1805-10.

3. Urbach AH et al. Am J Dis Child. 1988 Nov;142(11):1174-6.

4. Fink CW. Pediatr Infect Dis. 1983 Mar-Apr; 2(2):140-1.

5. Aballi A J and Bisken LC. Pediatr Infect Dis. 1984 Mar-Apr;3(2):187.

6. McCrindle BW et al. Circulation. 2017 Apr 25;135(17):e927-e99.

7.Sauvaget E et al. J Pediatr. 2012 May; 160(5),875-6.


 

Kawasaki disease

Given the presentation of persistent fever, nonpurulent conjunctivitis, cracked lips, erythematous tongue, desquamating perianal rash, and acral edema and erythema, suspicion was high for Kawasaki disease (KD). An echocardiogram revealed diffuse dilation of the left anterior descending artery without evidence of an aneurysm. The patient was promptly started on 2 g/kg IVIG and high-dose aspirin. She was later transitioned to low-dose aspirin. Long-term follow-up thus far has revealed no cardiac sequelae.

KD, or mucocutaneous lymph node syndrome, is a multisystem vasculitis with predilection for the coronary arteries that most commonly affects children between 6 months and 5 years of age.¹ While the etiology remains unclear, the pathogenesis is thought to be the result of an immune response to an infection in the setting of genetic susceptibility.¹ Approximately 90% of patients have mucocutaneous manifestations, highlighting the important role dermatologists play in the diagnosis and early intervention to prevent cardiovascular morbidity.

The diagnostic criteria include fever for at least 5 days accompanied by at least four of the following:

• Bilateral bulbar conjunctival injection without exudate that is classically limbal sparing.
• Oral mucosal changes with cracked fissured lips, “strawberry tongue,” or erythema of the lips and mucosa.
• Changes in the extremities: erythema, swelling, or periungual peeling.
• Polymorphous exanthem.
• Cervical lymphadenopathy, often unilateral (greater than 1.5 cm).

Courtesy Dr. Elizabeth H. Cusick and Dr. Molly E. Plovanich, department of dermatology at the University of Rochester (N.Y.)

Although nonspecific for diagnosis, laboratory abnormalities are common, including anemia, thrombocytosis, leukocytosis, elevated inflammatory markers, elevated alanine aminotransferase (ALT), hypoalbuminemia, and sterile pyuria on urine analysis.¹

Notably, a classic finding of KD is perineal dermatitis with desquamation occurring in the acute phase of disease in 80%-90% of patients.^2-5 In a retrospective review, up to 67% of patients with KD developed a perineal rash in the first week, most often beginning in the diaper area.² The perineal rash classically desquamates early during the acute phase of the disease.¹

While most individuals with KD follow a benign disease course, it is the most common cause of acquired heart disease in the United States.¹ Treatment is aimed at decreasing the risk of developing coronary abnormalities through the prompt administration of IVIG and high-dose aspirin initiated early in the acute phase.⁶ A second dose of IVIG may be given to patients who remain febrile within 24-48 hours after treatment.⁶ Infliximab has been used safely and effectively in patients with refractory KD.⁷ Long-term cardiac follow-up of KD patients is recommended.

Recently, there has been an emerging association between COVID-19 and pediatric multi-system inflammatory syndrome, which shares features with KD. Patients with pediatric multi-system inflammatory syndrome who meet clinical criteria for KD should be promptly treated with IVIG and aspirin to avoid long-term cardiac sequelae.

This case and the photos were submitted by Dr. Elizabeth H. Cusick and Dr. Molly E. Plovanich, both with the department of dermatology at the University of Rochester (N.Y.). Dr. Donna Bilu Martin edited the case.

Dr. Bilu Martin is a board-certified dermatologist in private practice at Premier Dermatology, MD, in Aventura, Fla. More diagnostic cases are available at mdedge.com/dermatology. To submit a case for possible publication, send an email to [email protected].

References

1. Bayers S et al. (2013). J Am Acad Dermatol. 2013 Oct;69(4):501.e1-11.

2. Friter BS and Lucky AW. Arch Dermatol. 1988 Dec;124(12):1805-10.

3. Urbach AH et al. Am J Dis Child. 1988 Nov;142(11):1174-6.

4. Fink CW. Pediatr Infect Dis. 1983 Mar-Apr; 2(2):140-1.

5. Aballi A J and Bisken LC. Pediatr Infect Dis. 1984 Mar-Apr;3(2):187.

6. McCrindle BW et al. Circulation. 2017 Apr 25;135(17):e927-e99.

7.Sauvaget E et al. J Pediatr. 2012 May; 160(5),875-6.


 

Kawasaki disease

Given the presentation of persistent fever, nonpurulent conjunctivitis, cracked lips, erythematous tongue, desquamating perianal rash, and acral edema and erythema, suspicion was high for Kawasaki disease (KD). An echocardiogram revealed diffuse dilation of the left anterior descending artery without evidence of an aneurysm. The patient was promptly started on 2 g/kg IVIG and high-dose aspirin. She was later transitioned to low-dose aspirin. Long-term follow-up thus far has revealed no cardiac sequelae.

KD, or mucocutaneous lymph node syndrome, is a multisystem vasculitis with predilection for the coronary arteries that most commonly affects children between 6 months and 5 years of age.¹ While the etiology remains unclear, the pathogenesis is thought to be the result of an immune response to an infection in the setting of genetic susceptibility.¹ Approximately 90% of patients have mucocutaneous manifestations, highlighting the important role dermatologists play in the diagnosis and early intervention to prevent cardiovascular morbidity.

The diagnostic criteria include fever for at least 5 days accompanied by at least four of the following:

• Bilateral bulbar conjunctival injection without exudate that is classically limbal sparing.
• Oral mucosal changes with cracked fissured lips, “strawberry tongue,” or erythema of the lips and mucosa.
• Changes in the extremities: erythema, swelling, or periungual peeling.
• Polymorphous exanthem.
• Cervical lymphadenopathy, often unilateral (greater than 1.5 cm).

Courtesy Dr. Elizabeth H. Cusick and Dr. Molly E. Plovanich, department of dermatology at the University of Rochester (N.Y.)

Although nonspecific for diagnosis, laboratory abnormalities are common, including anemia, thrombocytosis, leukocytosis, elevated inflammatory markers, elevated alanine aminotransferase (ALT), hypoalbuminemia, and sterile pyuria on urine analysis.¹

Notably, a classic finding of KD is perineal dermatitis with desquamation occurring in the acute phase of disease in 80%-90% of patients.^2-5 In a retrospective review, up to 67% of patients with KD developed a perineal rash in the first week, most often beginning in the diaper area.² The perineal rash classically desquamates early during the acute phase of the disease.¹

While most individuals with KD follow a benign disease course, it is the most common cause of acquired heart disease in the United States.¹ Treatment is aimed at decreasing the risk of developing coronary abnormalities through the prompt administration of IVIG and high-dose aspirin initiated early in the acute phase.⁶ A second dose of IVIG may be given to patients who remain febrile within 24-48 hours after treatment.⁶ Infliximab has been used safely and effectively in patients with refractory KD.⁷ Long-term cardiac follow-up of KD patients is recommended.

Recently, there has been an emerging association between COVID-19 and pediatric multi-system inflammatory syndrome, which shares features with KD. Patients with pediatric multi-system inflammatory syndrome who meet clinical criteria for KD should be promptly treated with IVIG and aspirin to avoid long-term cardiac sequelae.

This case and the photos were submitted by Dr. Elizabeth H. Cusick and Dr. Molly E. Plovanich, both with the department of dermatology at the University of Rochester (N.Y.). Dr. Donna Bilu Martin edited the case.

Dr. Bilu Martin is a board-certified dermatologist in private practice at Premier Dermatology, MD, in Aventura, Fla. More diagnostic cases are available at mdedge.com/dermatology. To submit a case for possible publication, send an email to [email protected].

References

1. Bayers S et al. (2013). J Am Acad Dermatol. 2013 Oct;69(4):501.e1-11.

2. Friter BS and Lucky AW. Arch Dermatol. 1988 Dec;124(12):1805-10.

3. Urbach AH et al. Am J Dis Child. 1988 Nov;142(11):1174-6.

4. Fink CW. Pediatr Infect Dis. 1983 Mar-Apr; 2(2):140-1.

5. Aballi A J and Bisken LC. Pediatr Infect Dis. 1984 Mar-Apr;3(2):187.

6. McCrindle BW et al. Circulation. 2017 Apr 25;135(17):e927-e99.

7.Sauvaget E et al. J Pediatr. 2012 May; 160(5),875-6.


 

Punch biopsy revealed collagen extravasation consistent with acquired reactive perforating collagenosis, an uncommon acquired disease that is seen in patients with longstanding renal disease or diabetes mellitus. The patient’s history of end-stage renal disease, paired with the eruptive nature of the pink papules with central firm plugs, pointed to the diagnosis.

The differential diagnosis for lesions like these includes prurigo nodularis and eruptive keratoacanthomas. Prurigo nodules would itch but likely lack a central plug. Eruptive keratoacanthomas would have a central keratinaceous plug but would be less likely to itch. A biopsy can help distinguish these entities.

Reactive perforating collagenosis can affect up to 10% of hemodialysis patients. It also can be associated with human immunodeficiency virus, hyperparathyroidism, hypothyroidism, liver disease, and sclerosing cholangitis. One theory of the etiology is that underlying disease causes skin itching and the subsequent trauma from scratching causes reactivity.

The work-up consists of a punch biopsy of the entire lesion or central plug. A biopsy limited to the edge of the lesion, or one that is shallow, may fail to connect altered dermal collagen with its follicular elimination and be misread as dermatitis.

Lesions often resolve spontaneously, but disease can be widespread. Topical steroids and antihistamines may reduce itching. Narrowband UVB, topical or systemic retinoids, tetracyclines, and cryotherapy all have had reported success. Narrowband UVB is especially helpful for uremic pruritus and, if available, may be the treatment of choice.

This patient was treated with topical steroids, oral cetirizine 10 mg/d, and cryotherapy to the most stubborn lesions. Over 3 months, the number of lesions and severity of symptoms improved. She continued hemodialysis and awaits a renal transplant.

‌

Photos and text for Photo Rounds Friday courtesy of Jonathan Karnes, MD (copyright retained). Dr. Karnes is the medical director of MDFMR Dermatology Services, Augusta, ME.

Punch biopsy revealed collagen extravasation consistent with acquired reactive perforating collagenosis, an uncommon acquired disease that is seen in patients with longstanding renal disease or diabetes mellitus. The patient’s history of end-stage renal disease, paired with the eruptive nature of the pink papules with central firm plugs, pointed to the diagnosis.

The differential diagnosis for lesions like these includes prurigo nodularis and eruptive keratoacanthomas. Prurigo nodules would itch but likely lack a central plug. Eruptive keratoacanthomas would have a central keratinaceous plug but would be less likely to itch. A biopsy can help distinguish these entities.

Reactive perforating collagenosis can affect up to 10% of hemodialysis patients. It also can be associated with human immunodeficiency virus, hyperparathyroidism, hypothyroidism, liver disease, and sclerosing cholangitis. One theory of the etiology is that underlying disease causes skin itching and the subsequent trauma from scratching causes reactivity.

The work-up consists of a punch biopsy of the entire lesion or central plug. A biopsy limited to the edge of the lesion, or one that is shallow, may fail to connect altered dermal collagen with its follicular elimination and be misread as dermatitis.

Lesions often resolve spontaneously, but disease can be widespread. Topical steroids and antihistamines may reduce itching. Narrowband UVB, topical or systemic retinoids, tetracyclines, and cryotherapy all have had reported success. Narrowband UVB is especially helpful for uremic pruritus and, if available, may be the treatment of choice.

This patient was treated with topical steroids, oral cetirizine 10 mg/d, and cryotherapy to the most stubborn lesions. Over 3 months, the number of lesions and severity of symptoms improved. She continued hemodialysis and awaits a renal transplant.

‌

Photos and text for Photo Rounds Friday courtesy of Jonathan Karnes, MD (copyright retained). Dr. Karnes is the medical director of MDFMR Dermatology Services, Augusta, ME.

Punch biopsy revealed collagen extravasation consistent with acquired reactive perforating collagenosis, an uncommon acquired disease that is seen in patients with longstanding renal disease or diabetes mellitus. The patient’s history of end-stage renal disease, paired with the eruptive nature of the pink papules with central firm plugs, pointed to the diagnosis.

The differential diagnosis for lesions like these includes prurigo nodularis and eruptive keratoacanthomas. Prurigo nodules would itch but likely lack a central plug. Eruptive keratoacanthomas would have a central keratinaceous plug but would be less likely to itch. A biopsy can help distinguish these entities.

Reactive perforating collagenosis can affect up to 10% of hemodialysis patients. It also can be associated with human immunodeficiency virus, hyperparathyroidism, hypothyroidism, liver disease, and sclerosing cholangitis. One theory of the etiology is that underlying disease causes skin itching and the subsequent trauma from scratching causes reactivity.

The work-up consists of a punch biopsy of the entire lesion or central plug. A biopsy limited to the edge of the lesion, or one that is shallow, may fail to connect altered dermal collagen with its follicular elimination and be misread as dermatitis.

Lesions often resolve spontaneously, but disease can be widespread. Topical steroids and antihistamines may reduce itching. Narrowband UVB, topical or systemic retinoids, tetracyclines, and cryotherapy all have had reported success. Narrowband UVB is especially helpful for uremic pruritus and, if available, may be the treatment of choice.

This patient was treated with topical steroids, oral cetirizine 10 mg/d, and cryotherapy to the most stubborn lesions. Over 3 months, the number of lesions and severity of symptoms improved. She continued hemodialysis and awaits a renal transplant.

‌

Photos and text for Photo Rounds Friday courtesy of Jonathan Karnes, MD (copyright retained). Dr. Karnes is the medical director of MDFMR Dermatology Services, Augusta, ME.

A 27-year-old man presented to the urgent care clinic with acute bilateral hand swelling, blisters, numbness, and pain. History taking revealed that these symptoms developed after he was locked outside of his apartment for 45 minutes in –22°C (–8°F) weather following a night of heavy drinking.

On physical examination, the patient had a temperature of 36.2°C (97.2°F) and a heart rate of 116 beats/min. He had edema, tenderness, decreased sensation, and distal cyanosis involving all of his fingers (FIGURE 1). He also had large, tense, clear bullae over the dorsal aspect of his fingers (FIGURE 2).

IMAGE COURTESY OF MORTEZA KHODAEE, MD, MPH

WHAT IS YOUR DIAGNOSIS?
HOW WOULD YOU TREAT THIS PATIENT?

 

 

Diagnosis: Second-degree frostbite

Frostbite is the result of tissue freezing, which generally occurs after prolonged exposure to freezing temperatures (typically –4°C or below).^1,2 The majority (~90%) of frostbite injuries occur in the hands and feet; however, frostbite has also been observed in the face, perineum, buttocks, and male genitalia.³

Angiography should be performed on patients with third- or fourth-degree frostbite. In cases of vascular occlusion, tPA and heparin can be started to reduce the risk for amputation.

Frostbite is a clinical diagnosis based on a history of sustained exposure to freezing temperatures, paresthesia of affected areas, and typical skin changes. Evidence is lacking regarding the epidemiology of frostbite within the general population.²

Pathophysiology. Intra- and extracellular ice crystal formation causes fluid and electrolyte disturbances, cell dehydration, lipid denaturation, and subsequent cell death.¹ After thawing, progressive tissue ischemia can occur as a result of endothelial damage and dysfunction, intravascular sludging, increased inflammatory markers, an influx of free radicals, and microvascular thrombosis.¹

Classification. Traditionally, frostbite has been classified according to a 4-tiered system based on tissue appearance after rewarming.² First-degree frostbite is characterized by white plaques with surrounding erythema; second degree by edema and clear or cloudy vesicles; third degree by hemorrhagic bullae; and fourth degree by cold and hard tissue that eventually progresses to gangrene.²

A simpler scheme designates frostbite as either superficial (corresponding to first- or second-degree frostbite) or deep (corresponding to third- or fourth-degree frostbite) with presumed muscle and bone involvement.²

Continue to: Risk factors

Risk factors. Frostbite is often associated with risk factors such as alcohol or drug intoxication, vehicular failure or trauma, immobilizing trauma, psychiatric illness, homelessness, Raynaud phenomenon, peripheral vascular disease, diabetes, inadequate clothing, previous cold-weather injury, outdoor winter recreation, and the use of certain medications (eg, beta-blockers).^1-3 Apart from environmental exposure, frostbite can also occur by direct contact with freezing materials, such as ice packs or industrial refrigerants.³

Differential includes nonfreezing injuries

Frostnip, pernio, and trench foot are other cold-weather injuries distinguished by the absence of tissue freezing.⁴ Raynaud phenomenon is a condition that is triggered by either cold temperatures or emotional stress.⁵

Frostnip is characterized by pallor and paresthesia of exposed areas. It may precede frostbite, but it quickly resolves after rewarming.²

Pernio occurs when skin is exposed to damp, cold, nonfreezing environments.⁶ It results in edematous and inflammatory skin lesions that may be painful, pruritic, violaceous, or erythematous.⁶ These lesions are typically found over the fingers, toes, nose, ears, buttocks, or thighs.^4,6 Pernio may be classified as either primary or secondary disease.⁵ Primary pernio is considered idiopathic.⁶ Secondary pernio is thought to be either drug induced or due to underlying autoimmune diseases, such as hepatitis or cryopathy.⁶

Trench foot develops under similar conditions to pernio but requires exposure to a wet environment for at least 10 to 14 hours.⁷ It is characterized by foot pain, paresthesia, pruritus, edema, erythema, cyanosis, blisters, and even gangrene if left untreated.⁷

Continue to: Raynaud phenomenon

Raynaud phenomenon results from transient, acral vasocontraction and manifests as well-demarcated pallor, cyanosis, and then erythema as the affected body part reperfuses.⁵ Similar to pernio, it can be categorized as either primary or secondary.⁵ Primary phenomenon is idiopathic. Secondary phenomenon is thought to be a result of autoimmune disease, use of certain medications, occupational vibratory exposure, obstructive vascular disease, or infection.⁵

In the absence of a history of exposure to subfreezing temperatures, frostbite can be excluded from the differential diagnosis.

Treatment entails rewarming

The aim of frostbite treatment is to save injured cells and minimize tissue loss.¹ This is accomplished through rapid rewarming and—in severe cases—reperfusion techniques.

Tissue should be rewarmed in a 37°C to 39°C water bath with povidone iodine or chlorhexidine added for antiseptic effect.¹ All efforts should be made to avoid refreezing or trauma, as this could worsen the initial injury.² Oral or intravenous hydration may be offered to optimize fluid status.¹ Supplemental oxygen may be administered to maintain saturations above 90%.¹ Nonsteroidal anti-inflammatory drugs are helpful for analgesia and anti-­inflammatory effect, and opioids can be used for breakthrough pain.¹ It is recommended that blisters be drained in a sterile fashion and that all affected tissue be covered with topical aloe vera and a loose dressing.^1,2,4

Treatment of severe frostbite. Angiography should be performed on all patients with third- or fourth-degree frostbite.³ If imaging shows evidence of vascular occlusion, tissue plasminogen activator (tPA) and heparin can be initiated within 24 hours to reduce the risk for amputation.^8-10

Continue to: Iloprost is another...

Iloprost is another proposed treatment for severe frostbite. It is a prostacyclin analog that may lower the amputation rate in patients with at least third-degree frostbite.¹¹ Unlike tPA, iloprost may be given to trauma patients, and it can be used more than 24 hours after injury.²

In cases of fourth-degree frostbite that is not successfully reperfused, amputation is delayed until dry gangrene develops. This often takes weeks to months.¹²

Our patient underwent rewarming and was orally rehydrated. He was discharged home with ibuprofen, oxycodone-­acetaminophen, topical aloe vera, and loose dressings. His bullae enlarged the next day (FIGURE 3). One week later, his blisters were debrided and dressed with silver sulfadiazine at his plastic surgery follow-up. He experienced sensory deficits for a few months, but eventually made a full recovery after 6 months with no remaining sequelae.

IMAGE COURTESY OF MORTEZA KHODAEE, MD, MPH

ACKNOWLEDGEMENT
The authors thank Lisa Kim, MD, for her clinical care of this patient.

CORRESPONDENCE
Morteza Khodaee, MD, MPH, University of Colorado School of Medicine, Department of Family Medicine, AFW Clinic, 3055 Roslyn Street, Denver, CO 80238; morteza.khodaee@ cuanschutz.edu

A 27-year-old man presented to the urgent care clinic with acute bilateral hand swelling, blisters, numbness, and pain. History taking revealed that these symptoms developed after he was locked outside of his apartment for 45 minutes in –22°C (–8°F) weather following a night of heavy drinking.

On physical examination, the patient had a temperature of 36.2°C (97.2°F) and a heart rate of 116 beats/min. He had edema, tenderness, decreased sensation, and distal cyanosis involving all of his fingers (FIGURE 1). He also had large, tense, clear bullae over the dorsal aspect of his fingers (FIGURE 2).

IMAGE COURTESY OF MORTEZA KHODAEE, MD, MPH

WHAT IS YOUR DIAGNOSIS?
HOW WOULD YOU TREAT THIS PATIENT?

 

 

Diagnosis: Second-degree frostbite

Frostbite is the result of tissue freezing, which generally occurs after prolonged exposure to freezing temperatures (typically –4°C or below).^1,2 The majority (~90%) of frostbite injuries occur in the hands and feet; however, frostbite has also been observed in the face, perineum, buttocks, and male genitalia.³

Angiography should be performed on patients with third- or fourth-degree frostbite. In cases of vascular occlusion, tPA and heparin can be started to reduce the risk for amputation.

Frostbite is a clinical diagnosis based on a history of sustained exposure to freezing temperatures, paresthesia of affected areas, and typical skin changes. Evidence is lacking regarding the epidemiology of frostbite within the general population.²

Pathophysiology. Intra- and extracellular ice crystal formation causes fluid and electrolyte disturbances, cell dehydration, lipid denaturation, and subsequent cell death.¹ After thawing, progressive tissue ischemia can occur as a result of endothelial damage and dysfunction, intravascular sludging, increased inflammatory markers, an influx of free radicals, and microvascular thrombosis.¹

Classification. Traditionally, frostbite has been classified according to a 4-tiered system based on tissue appearance after rewarming.² First-degree frostbite is characterized by white plaques with surrounding erythema; second degree by edema and clear or cloudy vesicles; third degree by hemorrhagic bullae; and fourth degree by cold and hard tissue that eventually progresses to gangrene.²

A simpler scheme designates frostbite as either superficial (corresponding to first- or second-degree frostbite) or deep (corresponding to third- or fourth-degree frostbite) with presumed muscle and bone involvement.²

Continue to: Risk factors

Risk factors. Frostbite is often associated with risk factors such as alcohol or drug intoxication, vehicular failure or trauma, immobilizing trauma, psychiatric illness, homelessness, Raynaud phenomenon, peripheral vascular disease, diabetes, inadequate clothing, previous cold-weather injury, outdoor winter recreation, and the use of certain medications (eg, beta-blockers).^1-3 Apart from environmental exposure, frostbite can also occur by direct contact with freezing materials, such as ice packs or industrial refrigerants.³

Differential includes nonfreezing injuries

Frostnip, pernio, and trench foot are other cold-weather injuries distinguished by the absence of tissue freezing.⁴ Raynaud phenomenon is a condition that is triggered by either cold temperatures or emotional stress.⁵

Frostnip is characterized by pallor and paresthesia of exposed areas. It may precede frostbite, but it quickly resolves after rewarming.²

Pernio occurs when skin is exposed to damp, cold, nonfreezing environments.⁶ It results in edematous and inflammatory skin lesions that may be painful, pruritic, violaceous, or erythematous.⁶ These lesions are typically found over the fingers, toes, nose, ears, buttocks, or thighs.^4,6 Pernio may be classified as either primary or secondary disease.⁵ Primary pernio is considered idiopathic.⁶ Secondary pernio is thought to be either drug induced or due to underlying autoimmune diseases, such as hepatitis or cryopathy.⁶

Trench foot develops under similar conditions to pernio but requires exposure to a wet environment for at least 10 to 14 hours.⁷ It is characterized by foot pain, paresthesia, pruritus, edema, erythema, cyanosis, blisters, and even gangrene if left untreated.⁷

Continue to: Raynaud phenomenon

Raynaud phenomenon results from transient, acral vasocontraction and manifests as well-demarcated pallor, cyanosis, and then erythema as the affected body part reperfuses.⁵ Similar to pernio, it can be categorized as either primary or secondary.⁵ Primary phenomenon is idiopathic. Secondary phenomenon is thought to be a result of autoimmune disease, use of certain medications, occupational vibratory exposure, obstructive vascular disease, or infection.⁵

In the absence of a history of exposure to subfreezing temperatures, frostbite can be excluded from the differential diagnosis.

Treatment entails rewarming

The aim of frostbite treatment is to save injured cells and minimize tissue loss.¹ This is accomplished through rapid rewarming and—in severe cases—reperfusion techniques.

Tissue should be rewarmed in a 37°C to 39°C water bath with povidone iodine or chlorhexidine added for antiseptic effect.¹ All efforts should be made to avoid refreezing or trauma, as this could worsen the initial injury.² Oral or intravenous hydration may be offered to optimize fluid status.¹ Supplemental oxygen may be administered to maintain saturations above 90%.¹ Nonsteroidal anti-inflammatory drugs are helpful for analgesia and anti-­inflammatory effect, and opioids can be used for breakthrough pain.¹ It is recommended that blisters be drained in a sterile fashion and that all affected tissue be covered with topical aloe vera and a loose dressing.^1,2,4

Treatment of severe frostbite. Angiography should be performed on all patients with third- or fourth-degree frostbite.³ If imaging shows evidence of vascular occlusion, tissue plasminogen activator (tPA) and heparin can be initiated within 24 hours to reduce the risk for amputation.^8-10

Continue to: Iloprost is another...

Iloprost is another proposed treatment for severe frostbite. It is a prostacyclin analog that may lower the amputation rate in patients with at least third-degree frostbite.¹¹ Unlike tPA, iloprost may be given to trauma patients, and it can be used more than 24 hours after injury.²

In cases of fourth-degree frostbite that is not successfully reperfused, amputation is delayed until dry gangrene develops. This often takes weeks to months.¹²

Our patient underwent rewarming and was orally rehydrated. He was discharged home with ibuprofen, oxycodone-­acetaminophen, topical aloe vera, and loose dressings. His bullae enlarged the next day (FIGURE 3). One week later, his blisters were debrided and dressed with silver sulfadiazine at his plastic surgery follow-up. He experienced sensory deficits for a few months, but eventually made a full recovery after 6 months with no remaining sequelae.

IMAGE COURTESY OF MORTEZA KHODAEE, MD, MPH

ACKNOWLEDGEMENT
The authors thank Lisa Kim, MD, for her clinical care of this patient.

CORRESPONDENCE
Morteza Khodaee, MD, MPH, University of Colorado School of Medicine, Department of Family Medicine, AFW Clinic, 3055 Roslyn Street, Denver, CO 80238; morteza.khodaee@ cuanschutz.edu

A 27-year-old man presented to the urgent care clinic with acute bilateral hand swelling, blisters, numbness, and pain. History taking revealed that these symptoms developed after he was locked outside of his apartment for 45 minutes in –22°C (–8°F) weather following a night of heavy drinking.

On physical examination, the patient had a temperature of 36.2°C (97.2°F) and a heart rate of 116 beats/min. He had edema, tenderness, decreased sensation, and distal cyanosis involving all of his fingers (FIGURE 1). He also had large, tense, clear bullae over the dorsal aspect of his fingers (FIGURE 2).

IMAGE COURTESY OF MORTEZA KHODAEE, MD, MPH

WHAT IS YOUR DIAGNOSIS?
HOW WOULD YOU TREAT THIS PATIENT?

 

 

Diagnosis: Second-degree frostbite

Frostbite is the result of tissue freezing, which generally occurs after prolonged exposure to freezing temperatures (typically –4°C or below).^1,2 The majority (~90%) of frostbite injuries occur in the hands and feet; however, frostbite has also been observed in the face, perineum, buttocks, and male genitalia.³

Angiography should be performed on patients with third- or fourth-degree frostbite. In cases of vascular occlusion, tPA and heparin can be started to reduce the risk for amputation.

Frostbite is a clinical diagnosis based on a history of sustained exposure to freezing temperatures, paresthesia of affected areas, and typical skin changes. Evidence is lacking regarding the epidemiology of frostbite within the general population.²

Pathophysiology. Intra- and extracellular ice crystal formation causes fluid and electrolyte disturbances, cell dehydration, lipid denaturation, and subsequent cell death.¹ After thawing, progressive tissue ischemia can occur as a result of endothelial damage and dysfunction, intravascular sludging, increased inflammatory markers, an influx of free radicals, and microvascular thrombosis.¹

Classification. Traditionally, frostbite has been classified according to a 4-tiered system based on tissue appearance after rewarming.² First-degree frostbite is characterized by white plaques with surrounding erythema; second degree by edema and clear or cloudy vesicles; third degree by hemorrhagic bullae; and fourth degree by cold and hard tissue that eventually progresses to gangrene.²

A simpler scheme designates frostbite as either superficial (corresponding to first- or second-degree frostbite) or deep (corresponding to third- or fourth-degree frostbite) with presumed muscle and bone involvement.²

Continue to: Risk factors

Risk factors. Frostbite is often associated with risk factors such as alcohol or drug intoxication, vehicular failure or trauma, immobilizing trauma, psychiatric illness, homelessness, Raynaud phenomenon, peripheral vascular disease, diabetes, inadequate clothing, previous cold-weather injury, outdoor winter recreation, and the use of certain medications (eg, beta-blockers).^1-3 Apart from environmental exposure, frostbite can also occur by direct contact with freezing materials, such as ice packs or industrial refrigerants.³

Differential includes nonfreezing injuries

Frostnip, pernio, and trench foot are other cold-weather injuries distinguished by the absence of tissue freezing.⁴ Raynaud phenomenon is a condition that is triggered by either cold temperatures or emotional stress.⁵

Frostnip is characterized by pallor and paresthesia of exposed areas. It may precede frostbite, but it quickly resolves after rewarming.²

Pernio occurs when skin is exposed to damp, cold, nonfreezing environments.⁶ It results in edematous and inflammatory skin lesions that may be painful, pruritic, violaceous, or erythematous.⁶ These lesions are typically found over the fingers, toes, nose, ears, buttocks, or thighs.^4,6 Pernio may be classified as either primary or secondary disease.⁵ Primary pernio is considered idiopathic.⁶ Secondary pernio is thought to be either drug induced or due to underlying autoimmune diseases, such as hepatitis or cryopathy.⁶

Trench foot develops under similar conditions to pernio but requires exposure to a wet environment for at least 10 to 14 hours.⁷ It is characterized by foot pain, paresthesia, pruritus, edema, erythema, cyanosis, blisters, and even gangrene if left untreated.⁷

Continue to: Raynaud phenomenon

Raynaud phenomenon results from transient, acral vasocontraction and manifests as well-demarcated pallor, cyanosis, and then erythema as the affected body part reperfuses.⁵ Similar to pernio, it can be categorized as either primary or secondary.⁵ Primary phenomenon is idiopathic. Secondary phenomenon is thought to be a result of autoimmune disease, use of certain medications, occupational vibratory exposure, obstructive vascular disease, or infection.⁵

In the absence of a history of exposure to subfreezing temperatures, frostbite can be excluded from the differential diagnosis.

Treatment entails rewarming

The aim of frostbite treatment is to save injured cells and minimize tissue loss.¹ This is accomplished through rapid rewarming and—in severe cases—reperfusion techniques.

Tissue should be rewarmed in a 37°C to 39°C water bath with povidone iodine or chlorhexidine added for antiseptic effect.¹ All efforts should be made to avoid refreezing or trauma, as this could worsen the initial injury.² Oral or intravenous hydration may be offered to optimize fluid status.¹ Supplemental oxygen may be administered to maintain saturations above 90%.¹ Nonsteroidal anti-inflammatory drugs are helpful for analgesia and anti-­inflammatory effect, and opioids can be used for breakthrough pain.¹ It is recommended that blisters be drained in a sterile fashion and that all affected tissue be covered with topical aloe vera and a loose dressing.^1,2,4

Treatment of severe frostbite. Angiography should be performed on all patients with third- or fourth-degree frostbite.³ If imaging shows evidence of vascular occlusion, tissue plasminogen activator (tPA) and heparin can be initiated within 24 hours to reduce the risk for amputation.^8-10

Continue to: Iloprost is another...

Iloprost is another proposed treatment for severe frostbite. It is a prostacyclin analog that may lower the amputation rate in patients with at least third-degree frostbite.¹¹ Unlike tPA, iloprost may be given to trauma patients, and it can be used more than 24 hours after injury.²

In cases of fourth-degree frostbite that is not successfully reperfused, amputation is delayed until dry gangrene develops. This often takes weeks to months.¹²

Our patient underwent rewarming and was orally rehydrated. He was discharged home with ibuprofen, oxycodone-­acetaminophen, topical aloe vera, and loose dressings. His bullae enlarged the next day (FIGURE 3). One week later, his blisters were debrided and dressed with silver sulfadiazine at his plastic surgery follow-up. He experienced sensory deficits for a few months, but eventually made a full recovery after 6 months with no remaining sequelae.

IMAGE COURTESY OF MORTEZA KHODAEE, MD, MPH

ACKNOWLEDGEMENT
The authors thank Lisa Kim, MD, for her clinical care of this patient.

CORRESPONDENCE
Morteza Khodaee, MD, MPH, University of Colorado School of Medicine, Department of Family Medicine, AFW Clinic, 3055 Roslyn Street, Denver, CO 80238; morteza.khodaee@ cuanschutz.edu

Photo-manipulated selfies can provide adolescents an influential window into the wrinkled, sun-damaged future that may be theirs if they’re not careful, a new study suggests.

In the study, researchers found that Brazilian teenagers, especially girls, were more likely to protect themselves from the sun if they got glimpses of how sun exposure could damage their faces. “The intervention used in this study was effective in convincing a substantial part of the students to take up regular sunscreen use and to examine their own skin regularly,” they wrote. “Moreover, these effects were maintained for at least half a year.”

The study, led by Titus J. Brinker, MD, of the department of dermatology, in the National Center for Tumor Diseases, German Cancer Research Center in Heidelberg, Germany, appeared online on May 6 in JAMA Dermatology (2020 May 6. doi: 10.1001/jamadermatol.2020.0511.

Dr. Brinker and colleagues launched the study in 2018 at eight public schools that serve grades 9-12 in Itaúna, a city in southeast Brazil, randomly assigning 1,573 students (52% girls, 48% boys; mean age, 16 years) to the intervention or control group.

Those in the intervention group attended seminars in which medical students showed them selfies of their classmates altered with a mobile phone app called Sunface, developed by Dr. Brinker. The free app examines photographs of faces and adds wrinkles, spots, precancerous lesions, and other signs of damage to them based on different levels of sun exposure over 5-25 years.

The app, which takes the skin types of the subjects into account, was described by the Vice news site as “terrifying” in a 2018 article. It “could very well scare you into using sunscreen and wearing hats,” the author of that article wrote.

The app appeared to do just that – but not universally, according to the new study.

At 6 months, there was no change in sun protection habits in the control group. But among those remaining in the intervention group, the use of daily sunscreen significantly increased from 15% (110 of 734 students) during the 30 days prior to the survey, to 23% (139 of 607 students) at the 6-month follow-up (P less than .001), as did the percentage of those who performed at least one skin self-examination within the 6 months (25% to 49%; P less than .001). The students were slightly less likely to use tanning beds within the previous month (19% to 15%; P = .04); the researchers speculate that it’s easier to gain a new healthy habit than get rid of an old unhealthy one.

Girls were much more likely to change their habits than boys. The number needed to treat to reach the primary endpoint, daily sunscreen use, was 8 for girls and 31 for boys.

The researchers noted that the dropout rate was higher in the intervention group (17%) vs. the control group (6%). “The intervention may have led to strong adverse reactions in some students, leading to the observed higher dropout rate in the intervention group,” they wrote. Changes to the way the app is used could improve the dropout rate, but potentially hurt the intervention’s impact, they added.

In an accompanying editorial in JAMA Dermatology, two health intervention researchers wrote that “this work represents a needed shift toward scalable interventions that bring messaging to target populations using their preferred technology” (2020 May 6. doi: 10.1001/jamadermatol.2020.0510).

Referring to the finding that sunscreen use did not change much among the boys in the study, the authors, Sherry L. Pagoto, PhD, of the Institute for Collaborations on Health, Interventions, and Policy at the University of Connecticut, Storrs, and Alan C. Geller, MPH, RN, of the Harvard TH Chan School of Public Health, Boston, also noted that “teen boys have been largely resistant to traditional and nontraditional forms of sun safety education.”

“Teasing out sex differences is important,” they added, “because sun protection interventions woven into existing programs at pools, beaches, and sporting events might be more appealing and enduring for boys, particularly if the technology they regularly use is leveraged.”

Dr. Brinker disclosed receiving an award from La Fondation la Roche-Posay, which also provided support for the study which partially funded the study, for his research on the Sunface app. The University of Itaúna provided other study funding. Several other study authors had various disclosures. Dr. Pagoto disclosed consulting work and personal fees from Johnson & Johnson, unrelated to the topic of the commentary; Dr. Geller had no disclosures.

SOURCES: Brinker TJ et al. JAMA Dermatol. 2020 May 6. doi: 10.1001/jamadermatol.2020.0511; Pagoto SL and Geller AC. JAMA Dermatol. 2020 May 6. doi: 10.1001/jamadermatol.2020.0510.

Photo-manipulated selfies can provide adolescents an influential window into the wrinkled, sun-damaged future that may be theirs if they’re not careful, a new study suggests.

In the study, researchers found that Brazilian teenagers, especially girls, were more likely to protect themselves from the sun if they got glimpses of how sun exposure could damage their faces. “The intervention used in this study was effective in convincing a substantial part of the students to take up regular sunscreen use and to examine their own skin regularly,” they wrote. “Moreover, these effects were maintained for at least half a year.”

The study, led by Titus J. Brinker, MD, of the department of dermatology, in the National Center for Tumor Diseases, German Cancer Research Center in Heidelberg, Germany, appeared online on May 6 in JAMA Dermatology (2020 May 6. doi: 10.1001/jamadermatol.2020.0511.

Dr. Brinker and colleagues launched the study in 2018 at eight public schools that serve grades 9-12 in Itaúna, a city in southeast Brazil, randomly assigning 1,573 students (52% girls, 48% boys; mean age, 16 years) to the intervention or control group.

Those in the intervention group attended seminars in which medical students showed them selfies of their classmates altered with a mobile phone app called Sunface, developed by Dr. Brinker. The free app examines photographs of faces and adds wrinkles, spots, precancerous lesions, and other signs of damage to them based on different levels of sun exposure over 5-25 years.

The app, which takes the skin types of the subjects into account, was described by the Vice news site as “terrifying” in a 2018 article. It “could very well scare you into using sunscreen and wearing hats,” the author of that article wrote.

The app appeared to do just that – but not universally, according to the new study.

At 6 months, there was no change in sun protection habits in the control group. But among those remaining in the intervention group, the use of daily sunscreen significantly increased from 15% (110 of 734 students) during the 30 days prior to the survey, to 23% (139 of 607 students) at the 6-month follow-up (P less than .001), as did the percentage of those who performed at least one skin self-examination within the 6 months (25% to 49%; P less than .001). The students were slightly less likely to use tanning beds within the previous month (19% to 15%; P = .04); the researchers speculate that it’s easier to gain a new healthy habit than get rid of an old unhealthy one.

Girls were much more likely to change their habits than boys. The number needed to treat to reach the primary endpoint, daily sunscreen use, was 8 for girls and 31 for boys.

The researchers noted that the dropout rate was higher in the intervention group (17%) vs. the control group (6%). “The intervention may have led to strong adverse reactions in some students, leading to the observed higher dropout rate in the intervention group,” they wrote. Changes to the way the app is used could improve the dropout rate, but potentially hurt the intervention’s impact, they added.

In an accompanying editorial in JAMA Dermatology, two health intervention researchers wrote that “this work represents a needed shift toward scalable interventions that bring messaging to target populations using their preferred technology” (2020 May 6. doi: 10.1001/jamadermatol.2020.0510).

Referring to the finding that sunscreen use did not change much among the boys in the study, the authors, Sherry L. Pagoto, PhD, of the Institute for Collaborations on Health, Interventions, and Policy at the University of Connecticut, Storrs, and Alan C. Geller, MPH, RN, of the Harvard TH Chan School of Public Health, Boston, also noted that “teen boys have been largely resistant to traditional and nontraditional forms of sun safety education.”

“Teasing out sex differences is important,” they added, “because sun protection interventions woven into existing programs at pools, beaches, and sporting events might be more appealing and enduring for boys, particularly if the technology they regularly use is leveraged.”

Dr. Brinker disclosed receiving an award from La Fondation la Roche-Posay, which also provided support for the study which partially funded the study, for his research on the Sunface app. The University of Itaúna provided other study funding. Several other study authors had various disclosures. Dr. Pagoto disclosed consulting work and personal fees from Johnson & Johnson, unrelated to the topic of the commentary; Dr. Geller had no disclosures.

SOURCES: Brinker TJ et al. JAMA Dermatol. 2020 May 6. doi: 10.1001/jamadermatol.2020.0511; Pagoto SL and Geller AC. JAMA Dermatol. 2020 May 6. doi: 10.1001/jamadermatol.2020.0510.

Photo-manipulated selfies can provide adolescents an influential window into the wrinkled, sun-damaged future that may be theirs if they’re not careful, a new study suggests.

In the study, researchers found that Brazilian teenagers, especially girls, were more likely to protect themselves from the sun if they got glimpses of how sun exposure could damage their faces. “The intervention used in this study was effective in convincing a substantial part of the students to take up regular sunscreen use and to examine their own skin regularly,” they wrote. “Moreover, these effects were maintained for at least half a year.”

The study, led by Titus J. Brinker, MD, of the department of dermatology, in the National Center for Tumor Diseases, German Cancer Research Center in Heidelberg, Germany, appeared online on May 6 in JAMA Dermatology (2020 May 6. doi: 10.1001/jamadermatol.2020.0511.

Dr. Brinker and colleagues launched the study in 2018 at eight public schools that serve grades 9-12 in Itaúna, a city in southeast Brazil, randomly assigning 1,573 students (52% girls, 48% boys; mean age, 16 years) to the intervention or control group.

Those in the intervention group attended seminars in which medical students showed them selfies of their classmates altered with a mobile phone app called Sunface, developed by Dr. Brinker. The free app examines photographs of faces and adds wrinkles, spots, precancerous lesions, and other signs of damage to them based on different levels of sun exposure over 5-25 years.

The app, which takes the skin types of the subjects into account, was described by the Vice news site as “terrifying” in a 2018 article. It “could very well scare you into using sunscreen and wearing hats,” the author of that article wrote.

The app appeared to do just that – but not universally, according to the new study.

At 6 months, there was no change in sun protection habits in the control group. But among those remaining in the intervention group, the use of daily sunscreen significantly increased from 15% (110 of 734 students) during the 30 days prior to the survey, to 23% (139 of 607 students) at the 6-month follow-up (P less than .001), as did the percentage of those who performed at least one skin self-examination within the 6 months (25% to 49%; P less than .001). The students were slightly less likely to use tanning beds within the previous month (19% to 15%; P = .04); the researchers speculate that it’s easier to gain a new healthy habit than get rid of an old unhealthy one.

Girls were much more likely to change their habits than boys. The number needed to treat to reach the primary endpoint, daily sunscreen use, was 8 for girls and 31 for boys.

The researchers noted that the dropout rate was higher in the intervention group (17%) vs. the control group (6%). “The intervention may have led to strong adverse reactions in some students, leading to the observed higher dropout rate in the intervention group,” they wrote. Changes to the way the app is used could improve the dropout rate, but potentially hurt the intervention’s impact, they added.

In an accompanying editorial in JAMA Dermatology, two health intervention researchers wrote that “this work represents a needed shift toward scalable interventions that bring messaging to target populations using their preferred technology” (2020 May 6. doi: 10.1001/jamadermatol.2020.0510).

Referring to the finding that sunscreen use did not change much among the boys in the study, the authors, Sherry L. Pagoto, PhD, of the Institute for Collaborations on Health, Interventions, and Policy at the University of Connecticut, Storrs, and Alan C. Geller, MPH, RN, of the Harvard TH Chan School of Public Health, Boston, also noted that “teen boys have been largely resistant to traditional and nontraditional forms of sun safety education.”

“Teasing out sex differences is important,” they added, “because sun protection interventions woven into existing programs at pools, beaches, and sporting events might be more appealing and enduring for boys, particularly if the technology they regularly use is leveraged.”

Dr. Brinker disclosed receiving an award from La Fondation la Roche-Posay, which also provided support for the study which partially funded the study, for his research on the Sunface app. The University of Itaúna provided other study funding. Several other study authors had various disclosures. Dr. Pagoto disclosed consulting work and personal fees from Johnson & Johnson, unrelated to the topic of the commentary; Dr. Geller had no disclosures.

SOURCES: Brinker TJ et al. JAMA Dermatol. 2020 May 6. doi: 10.1001/jamadermatol.2020.0511; Pagoto SL and Geller AC. JAMA Dermatol. 2020 May 6. doi: 10.1001/jamadermatol.2020.0510.

A 45-year-old man presented to the Dermatology Clinic with a 4-month history of a bump on his left upper back. The lesion was tender and had been draining clear fluid and intermittent blood; he denied any preceding trauma. He had been seen both by his primary care physician and by a physician at an urgent care clinic, where he was told to use an antibiotic ointment and benzoyl peroxide daily on the area and advised to seek a dermatology consult should it not resolve. He did not see any improvement from these measures.

Physical exam revealed a 0.8-cm erythematous nodule with a peripheral collarette of scale at its base. The bandage used to cover the nodule was stained with hemorrhagic crust (FIGURE 1A). Superior and medial to the new lesion was a well-healed scar overlying much of the patient’s thoracic spine (FIGURE 1B).

WHAT IS YOUR DIAGNOSIS?
HOW WOULD YOU TREAT THIS PATIENT?

 

 

Diagnosis: Metastatic renal cell carcinoma

The nodule initially appeared to be a benign pyogenic granuloma. In fact, a biopsy of the nodule showed a profile similar to that of a pyogenic granuloma and it exhibited granulation tissue. However, further questioning revealed that the patient had a history of metastatic clear cell renal carcinoma. (The scar was from a prior unrelated orthopedic surgery.) Immunohistochemical stains showed positive staining in the cells of interest for PAX8 and CK8, 2 markers for renal cell lineage.

Consider biopsy of a pyogenic granuloma–like lesion or one with a vascular pattern on dermoscopy in any patient with a history of malignancy

Cutaneous metastasis to the skin is a rare event, representing roughly 2% of all skin tumors.¹ Anatomically, lesions tend to appear on the head and neck in men and anterior chest and abdomen in women.² Eruptions on the back, as seen in our patient, are relatively rare. The primary source of the metastasis also is gender dependent. Melanoma is the most common source overall; but in women, breast cancer represents the large majority of cutaneous metastases³ while in men lung, large intestine, and oral cavity tumors are the most common origin.³ Renal metastases are the fourth most common cause in men.³

The clinical morphology of cutaneous metastases is protean; the most common manifestations are nodules, papules, plaques, tumors, and ulcers.² Rare manifestations include alopecia plaques, erysipelas, herpes zoster–like eruptions,⁴ and pyogenic granuloma–like manifestations, as in our case. Pyogenic granuloma–like manifestations have been described in renal cell carcinoma, breast carcinoma, acute myelogenous leukemia,⁵ and hepatocellular carcinoma.⁶

Differential includes an array of erythematous nodules

The differential diagnosis of a lesion with the appearance of a pyogenic granuloma is ­variable.

Pyogenic granulomas tend to arise over a short period of time. They are more common in children and pregnant women. Pyogenic granulomas can manifest anywhere but often are reported on the digits and extremities. Clinical history is important to ensure no history of internal malignancy.

Continue to: Bartonella henselae

Bartonella henselae, known as “cat scratch disease,” also can present as a friable, erythematous nodule reminiscent of a pyogenic granuloma. Patients with bartonella henselae usually are immunocompromised and/or have had close contact with a cat.⁷

Kaposi sarcoma is a vascular tumor that may manifest as erythematous papules or nodules. Erythematous or violaceous patches or plaques may be present before a nodule arises. Kaposi sarcoma may manifest on the legs of elderly patients or anywhere on immunocompromised patients. Immunohistochemical stains for human herpesvirus-8 can clinch the diagnosis.⁸

Amelanotic melanoma may be impossible to discern clinically from a pyogenic granuloma. It appears as erythematous, violaceous, or flesh-colored nodules. Histologic evaluation is paramount in the diagnosis.⁹

Clinical suspicion should prompt a biopsy

The diagnosis of metastatic renal cell carcinoma is made on clinical suspicion and skin biopsy. Dermoscopy is an important tool in the evaluation of primary cutaneous tumors. Due to the rarity of cutaneous metastases, studies on dermoscopic findings in cutaneous metastases are limited to case series. One series showed a vascular dermoscopy pattern in 15 of 17 cases (88%).¹⁰

In light of this nonspecific pattern, it’s wise to consider biopsy of a pyogenic granuloma–like lesion or one with a vascular pattern on dermoscopy in any patient with a history of malignancy. Any lesion suspected of being a pyogenic granuloma that does not respond to conservative measures also would warrant a biopsy. Definitive diagnosis is made based upon histologic evaluation.

Continue to: Surgery is the cornerstone of treatment

 

 

Surgery is the cornerstone of treatment

Upon diagnosis, immediate referral for further local and systemic control is recommended. Treatment may consist of any combination of surgery, chemotherapy, immunotherapy, or radiation.¹¹

In this case, our patient was referred to Oncology for further treatment. Unfortunately, cutaneous metastases portend a very poor prognosis, with approximate survival times of 7.5 months.¹²

CORRESPONDENCE
M. Tye Haeberle, MD, 3810 Springhurst Boulevard, Ste 200, Louisville, KY 40241; [email protected]

A 45-year-old man presented to the Dermatology Clinic with a 4-month history of a bump on his left upper back. The lesion was tender and had been draining clear fluid and intermittent blood; he denied any preceding trauma. He had been seen both by his primary care physician and by a physician at an urgent care clinic, where he was told to use an antibiotic ointment and benzoyl peroxide daily on the area and advised to seek a dermatology consult should it not resolve. He did not see any improvement from these measures.

Physical exam revealed a 0.8-cm erythematous nodule with a peripheral collarette of scale at its base. The bandage used to cover the nodule was stained with hemorrhagic crust (FIGURE 1A). Superior and medial to the new lesion was a well-healed scar overlying much of the patient’s thoracic spine (FIGURE 1B).

WHAT IS YOUR DIAGNOSIS?
HOW WOULD YOU TREAT THIS PATIENT?

 

 

Diagnosis: Metastatic renal cell carcinoma

The nodule initially appeared to be a benign pyogenic granuloma. In fact, a biopsy of the nodule showed a profile similar to that of a pyogenic granuloma and it exhibited granulation tissue. However, further questioning revealed that the patient had a history of metastatic clear cell renal carcinoma. (The scar was from a prior unrelated orthopedic surgery.) Immunohistochemical stains showed positive staining in the cells of interest for PAX8 and CK8, 2 markers for renal cell lineage.

Consider biopsy of a pyogenic granuloma–like lesion or one with a vascular pattern on dermoscopy in any patient with a history of malignancy

Cutaneous metastasis to the skin is a rare event, representing roughly 2% of all skin tumors.¹ Anatomically, lesions tend to appear on the head and neck in men and anterior chest and abdomen in women.² Eruptions on the back, as seen in our patient, are relatively rare. The primary source of the metastasis also is gender dependent. Melanoma is the most common source overall; but in women, breast cancer represents the large majority of cutaneous metastases³ while in men lung, large intestine, and oral cavity tumors are the most common origin.³ Renal metastases are the fourth most common cause in men.³

The clinical morphology of cutaneous metastases is protean; the most common manifestations are nodules, papules, plaques, tumors, and ulcers.² Rare manifestations include alopecia plaques, erysipelas, herpes zoster–like eruptions,⁴ and pyogenic granuloma–like manifestations, as in our case. Pyogenic granuloma–like manifestations have been described in renal cell carcinoma, breast carcinoma, acute myelogenous leukemia,⁵ and hepatocellular carcinoma.⁶

Differential includes an array of erythematous nodules

The differential diagnosis of a lesion with the appearance of a pyogenic granuloma is ­variable.

Pyogenic granulomas tend to arise over a short period of time. They are more common in children and pregnant women. Pyogenic granulomas can manifest anywhere but often are reported on the digits and extremities. Clinical history is important to ensure no history of internal malignancy.

Continue to: Bartonella henselae

Bartonella henselae, known as “cat scratch disease,” also can present as a friable, erythematous nodule reminiscent of a pyogenic granuloma. Patients with bartonella henselae usually are immunocompromised and/or have had close contact with a cat.⁷

Kaposi sarcoma is a vascular tumor that may manifest as erythematous papules or nodules. Erythematous or violaceous patches or plaques may be present before a nodule arises. Kaposi sarcoma may manifest on the legs of elderly patients or anywhere on immunocompromised patients. Immunohistochemical stains for human herpesvirus-8 can clinch the diagnosis.⁸

Amelanotic melanoma may be impossible to discern clinically from a pyogenic granuloma. It appears as erythematous, violaceous, or flesh-colored nodules. Histologic evaluation is paramount in the diagnosis.⁹

Clinical suspicion should prompt a biopsy

The diagnosis of metastatic renal cell carcinoma is made on clinical suspicion and skin biopsy. Dermoscopy is an important tool in the evaluation of primary cutaneous tumors. Due to the rarity of cutaneous metastases, studies on dermoscopic findings in cutaneous metastases are limited to case series. One series showed a vascular dermoscopy pattern in 15 of 17 cases (88%).¹⁰

In light of this nonspecific pattern, it’s wise to consider biopsy of a pyogenic granuloma–like lesion or one with a vascular pattern on dermoscopy in any patient with a history of malignancy. Any lesion suspected of being a pyogenic granuloma that does not respond to conservative measures also would warrant a biopsy. Definitive diagnosis is made based upon histologic evaluation.

Continue to: Surgery is the cornerstone of treatment

 

 

Surgery is the cornerstone of treatment

Upon diagnosis, immediate referral for further local and systemic control is recommended. Treatment may consist of any combination of surgery, chemotherapy, immunotherapy, or radiation.¹¹

In this case, our patient was referred to Oncology for further treatment. Unfortunately, cutaneous metastases portend a very poor prognosis, with approximate survival times of 7.5 months.¹²

CORRESPONDENCE
M. Tye Haeberle, MD, 3810 Springhurst Boulevard, Ste 200, Louisville, KY 40241; [email protected]

A 45-year-old man presented to the Dermatology Clinic with a 4-month history of a bump on his left upper back. The lesion was tender and had been draining clear fluid and intermittent blood; he denied any preceding trauma. He had been seen both by his primary care physician and by a physician at an urgent care clinic, where he was told to use an antibiotic ointment and benzoyl peroxide daily on the area and advised to seek a dermatology consult should it not resolve. He did not see any improvement from these measures.

Physical exam revealed a 0.8-cm erythematous nodule with a peripheral collarette of scale at its base. The bandage used to cover the nodule was stained with hemorrhagic crust (FIGURE 1A). Superior and medial to the new lesion was a well-healed scar overlying much of the patient’s thoracic spine (FIGURE 1B).

WHAT IS YOUR DIAGNOSIS?
HOW WOULD YOU TREAT THIS PATIENT?

 

 

Diagnosis: Metastatic renal cell carcinoma

The nodule initially appeared to be a benign pyogenic granuloma. In fact, a biopsy of the nodule showed a profile similar to that of a pyogenic granuloma and it exhibited granulation tissue. However, further questioning revealed that the patient had a history of metastatic clear cell renal carcinoma. (The scar was from a prior unrelated orthopedic surgery.) Immunohistochemical stains showed positive staining in the cells of interest for PAX8 and CK8, 2 markers for renal cell lineage.

Consider biopsy of a pyogenic granuloma–like lesion or one with a vascular pattern on dermoscopy in any patient with a history of malignancy

Cutaneous metastasis to the skin is a rare event, representing roughly 2% of all skin tumors.¹ Anatomically, lesions tend to appear on the head and neck in men and anterior chest and abdomen in women.² Eruptions on the back, as seen in our patient, are relatively rare. The primary source of the metastasis also is gender dependent. Melanoma is the most common source overall; but in women, breast cancer represents the large majority of cutaneous metastases³ while in men lung, large intestine, and oral cavity tumors are the most common origin.³ Renal metastases are the fourth most common cause in men.³

The clinical morphology of cutaneous metastases is protean; the most common manifestations are nodules, papules, plaques, tumors, and ulcers.² Rare manifestations include alopecia plaques, erysipelas, herpes zoster–like eruptions,⁴ and pyogenic granuloma–like manifestations, as in our case. Pyogenic granuloma–like manifestations have been described in renal cell carcinoma, breast carcinoma, acute myelogenous leukemia,⁵ and hepatocellular carcinoma.⁶

Differential includes an array of erythematous nodules

The differential diagnosis of a lesion with the appearance of a pyogenic granuloma is ­variable.

Pyogenic granulomas tend to arise over a short period of time. They are more common in children and pregnant women. Pyogenic granulomas can manifest anywhere but often are reported on the digits and extremities. Clinical history is important to ensure no history of internal malignancy.

Continue to: Bartonella henselae

Bartonella henselae, known as “cat scratch disease,” also can present as a friable, erythematous nodule reminiscent of a pyogenic granuloma. Patients with bartonella henselae usually are immunocompromised and/or have had close contact with a cat.⁷

Kaposi sarcoma is a vascular tumor that may manifest as erythematous papules or nodules. Erythematous or violaceous patches or plaques may be present before a nodule arises. Kaposi sarcoma may manifest on the legs of elderly patients or anywhere on immunocompromised patients. Immunohistochemical stains for human herpesvirus-8 can clinch the diagnosis.⁸

Amelanotic melanoma may be impossible to discern clinically from a pyogenic granuloma. It appears as erythematous, violaceous, or flesh-colored nodules. Histologic evaluation is paramount in the diagnosis.⁹

Clinical suspicion should prompt a biopsy

The diagnosis of metastatic renal cell carcinoma is made on clinical suspicion and skin biopsy. Dermoscopy is an important tool in the evaluation of primary cutaneous tumors. Due to the rarity of cutaneous metastases, studies on dermoscopic findings in cutaneous metastases are limited to case series. One series showed a vascular dermoscopy pattern in 15 of 17 cases (88%).¹⁰

In light of this nonspecific pattern, it’s wise to consider biopsy of a pyogenic granuloma–like lesion or one with a vascular pattern on dermoscopy in any patient with a history of malignancy. Any lesion suspected of being a pyogenic granuloma that does not respond to conservative measures also would warrant a biopsy. Definitive diagnosis is made based upon histologic evaluation.

Continue to: Surgery is the cornerstone of treatment

 

 

Surgery is the cornerstone of treatment

Upon diagnosis, immediate referral for further local and systemic control is recommended. Treatment may consist of any combination of surgery, chemotherapy, immunotherapy, or radiation.¹¹

In this case, our patient was referred to Oncology for further treatment. Unfortunately, cutaneous metastases portend a very poor prognosis, with approximate survival times of 7.5 months.¹²

CORRESPONDENCE
M. Tye Haeberle, MD, 3810 Springhurst Boulevard, Ste 200, Louisville, KY 40241; [email protected]

The “heartbreak of psoriasis,” coined by an advertiser in the 1960s, conveyed the notion that this disease was a cosmetic disorder mainly limited to skin involvement. John Updike’s article in the September 1985 issue of The New Yorker, “At War With My Skin,” detailed Mr. Updike’s feelings of isolation and stress related to his condition, helping to reframe the popular concept of psoriasis.¹ Updike’s eloquent account describing his struggles to find effective treatment increased public awareness about psoriasis, which in fact affects other body systems as well.

The overall prevalence of psoriasis is 1.5% to 3.1% in the United States and United Kingdom.^2,3 More than 6.5 million adults in the United States > 20 years of age are affected.³ The most commonly affected demographic group is non-­Hispanic Caucasians.

Our expanding knowledge of pathogenesis

Studies of genetic linkage have identified genes and single nucleotide polymorphisms associated with psoriasis.⁴ The interaction between environmental triggers and the innate and adaptive immune systems leads to keratinocyte hyperproliferation. Tumor necrosis factor (TNF), interleukin (IL) 23, and IL-17 are important cytokines associated with psoriatic inflammation.⁴ There are common pathways of inflammation in both psoriasis and cardiovascular disease resulting in oxidative stress and endothelial cell dysfunction.⁴ Ninety percent of early-onset psoriasis is associated with human leukocyte antigen (HLA)-Cw6.⁴ And alterations in the microbiome of the skin may contribute, as reduced microbial diversity has been found in psoriatic lesions.⁵

Comorbidities are common

Psoriasis is an independent risk factor for diabetes and major adverse cardiovascular events.⁶ Hypertension, dyslipidemia, inflammatory bowel disease, nonalcoholic fatty liver disease, chronic kidney disease, and lymphoma (particularly cutaneous T-cell lymphoma) are also associated with psoriasis.⁶ Psoriatic arthritis is frequently encountered with cutaneous psoriasis; however, it is often not recognized until late in the disease course.

There also appears to be an association among psoriasis, dietary factors, and celiac disease.^7-9 Positive testing for IgA anti-endomysial antibodies and IgA tissue transglutaminase antibodies should prompt consideration of starting a gluten-free diet, which has been shown to improve psoriatic lesions.⁹ In addition to its impact on physical health, cutaneous psoriasis often affects mental health. Increased anxiety, depression, and sleep disorders are commonly encountered, revealing the far-reaching effects of psoriasis. The persistent associated itch of psoriasis is often distressing and negatively impacts the patient’s quality of life.

The different types of psoriasis

The classic presentation of psoriasis involves stubborn plaques with silvery scale on extensor surfaces such as the elbows and knees. The severity of the disease corresponds with the amount of body surface area affected. While plaque-type psoriasis is the most common form, other patterns exist. Individuals may exhibit 1 dominant pattern or multiple psoriatic variants simultaneously. Most types of psoriasis have 3 characteristic features: erythema, skin thickening, and scales.

Certain history and physical clues can aid in diagnosing psoriasis; these include the Koebner phenomenon, the Auspitz sign, and the Woronoff ring. The Koebner phenomenon refers to the development of psoriatic lesions in an area of trauma (FIGURE 1), frequently resulting in a linear streak-like appearance. The Auspitz sign describes the pinpoint bleeding that may be encountered with the removal of a psoriatic plaque. The Woronoff ring is a pale blanching ring that may surround a psoriatic lesion.

Continue to: Chronic plaque-type psoriasis

Chronic plaque-type psoriasis (Figures 2A and 2B), the most common variant, is characterized by sharply demarcated pink papules and plaques with a silvery scale in a symmetric distribution on the extensor surfaces, scalp, trunk, and lumbosacral areas.

PHOTOS COURTESY OF JEFFREY J. MILLER, MD, MBA, PENN STATE COLLEGE OF MEDICINE, AND BRYAN E. ANDERSON, MD, PENN STATE COLLEGE OF MEDICINE, DEPARTMENT OF DERMATOLOGY, PA

Guttate psoriasis (FIGURE 3) features small (often < 1 cm) pink scaly papules that appear suddenly. It is more commonly seen in children and is usually preceded by an upper respiratory tract infection, often with Streptococcus.¹⁰ If strep testing is positive, guttate psoriasis may improve after appropriate antibiotic treatment.

PHOTO COURTESY OF JEFFREY J. MILLER, MD, MBA, PENN STATE COLLEGE OF MEDICINE, AND BRYAN E. ANDERSON, MD, PENN STATE COLLEGE OF MEDICINE, DEPARTMENT OF DERMATOLOGY, PA

Erythrodermic psoriasis (FIGUREs 4A and 4B) involves at least 75% of the body with erythema and scaling.¹¹ Erythroderma can be caused by many other conditions such as atopic dermatitis, a drug reaction, Sezary syndrome, seborrheic dermatitis, and pityriasis rubra pilaris. Treatments for other conditions in the differential diagnosis can potentially make psoriasis worse. Unfortunately, findings on a skin biopsy are often nonspecific, making careful clinical observation crucial to arriving at an accurate diagnosis.

PHOTOS COURTESY OF JEFFREY J. MILLER, MD, MBA, PENN STATE COLLEGE OF MEDICINE, AND BRYAN E. ANDERSON, MD, PENN STATE COLLEGE OF MEDICINE, DEPARTMENT OF DERMATOLOGY, PA

Pustular psoriasis is characterized by bright erythema and sterile pustules. Pustular psoriasis can be triggered by pregnancy, sudden tapering of corticosteroids, hypocalcemia, and infection. Involvement of the palms and soles with severe desquamation can drastically impact daily functioning and quality of life.

Inverse or flexural psoriasis (FIGUREs 5A and 5B) is characterized by shiny, pink-to-red sharply demarcated plaques involving intertriginous areas, typically the groin, inguinal crease, axilla, inframammary regions, and intergluteal cleft.

PHOTOS COURTESY OF JEFFREY J. MILLER, MD, MBA, PENN STATE COLLEGE OF MEDICINE, AND BRYAN E. ANDERSON, MD, PENN STATE COLLEGE OF MEDICINE, DEPARTMENT OF DERMATOLOGY, PA

Continue to: Geographic tongue

Geographic tongue describes psoriasis of the tongue. The mucosa of the tongue has white plaques with a geographic border. Instead of scale, the moisture on the tongue causes areas of hyperkeratosis that appear white.

Nail psoriasis can manifest as nail pitting (FIGURE 6), oil staining, onycholysis (distal lifting of the nail), and subungual hyperkeratosis. Nail psoriasis is often quite distressing for patients and can be difficult to treat.

PHOTO COURTESY OF JEFFREY J. MILLER, MD, MBA, PENN STATE COLLEGE OF MEDICINE, AND BRYAN E. ANDERSON, MD, PENN STATE COLLEGE OF MEDICINE, DEPARTMENT OF DERMATOLOGY, PA

Palmoplantar psoriasis (FIGUREs 7A and 7B) can be painful due to the involvement of the palms of the hands and soles of the feet. Lesions will either be similar to other psoriatic plaques with well-demarcated erythematous scaling lesions or involve thickening and scale without associated erythema.

PHOTOS COURTESY OF JEFFREY J. MILLER, MD, MBA, PENN STATE COLLEGE OF MEDICINE, AND BRYAN E. ANDERSON, MD, PENN STATE COLLEGE OF MEDICINE, DEPARTMENT OF DERMATOLOGY, PA

Psoriatic arthritis can cause significant joint damage and disability. Most affected individuals with psoriatic arthritis have a history of preceding skin disease.¹² There are no specific lab tests for psoriasis; radiologic studies can show bulky syndesmophytes, central and marginal erosions, and periostitis. Patterns of joint involvement are variable. Psoriatic arthritis is more likely to affect the distal interphalangeal joints than rheumatoid arthritis and is more likely to affect the metacarpophalangeal joints than osteoarthritis.¹³

Nail psoriasis is often quite distressing for patients and can be difficult to treat.

Psoriatic arthritis often progresses insidiously and is commonly described as causing discomfort rather than acute pain. Enthesitis, inflammation at the site where tendons or ligaments insert into the bone, is often present. Joint destruction may lead to the telescoping “opera glass” digit (FIGURE 8).

PHOTO COURTESY OF JEFFREY J. MILLER, MD, MBA, PENN STATE COLLEGE OF MEDICINE, AND BRYAN E. ANDERSON, MD, PENN STATE COLLEGE OF MEDICINE, DEPARTMENT OF DERMATOLOGY, PA

Continue to: Drug-provoked psoriasis

Drug-provoked psoriasis is divided into 2 groups: drug-induced and drug-­aggravated. Drug-induced psoriasis will improve after discontinuation of the causative drug and tends to occur in patients without a personal or family history of psoriasis. Drug-aggravated psoriasis continues to progress after the discontinuation of the offending drug and is more often seen in patients with a history of psoriasis.¹⁴ Drugs that most commonly provoke psoriasis are beta-blockers, lithium, and antimalarials.¹⁰ Other potentially aggravating agents include antibiotics, digoxin, and nonsteroidal anti-inflammatory drugs.¹⁰

Consider these skin disorders in the differential diagnosis

The diagnosis of psoriasis is usually clinical, and a skin biopsy is rarely needed. However, a range of other skin disorders should be kept in mind when considering the differential diagnosis.

Mycosis fungoides is a type of cutaneous T-cell lymphoma that forms erythematous plaques that may show wrinkling and epidermal atrophy in sun-protected sites. Onset usually occurs among the elderly.

Pityriasis rubra pilaris is characterized by salmon-colored patches that may have small areas of normal skin (“islands of sparing”), hyperkeratotic follicular papules, and hyperkeratosis of the palms and soles.

Seborrheic dermatitis, dandruff of the skin, usually involves the scalp and nasolabial areas and the T-zone of the face.

Continue to: Lichen planus

Lichen planus usually appears slightly more purple than psoriasis and typically involves the mouth, flexural surfaces of the wrists, genitals, and ankles.

Other conditions in the differential include pityriasis lichenoides chronica, which may be identified on skin biopsy. Inverse psoriasis can be difficult to differentiate from candida intertrigo, erythrasma, or tinea cruris.

A potassium hydroxide (KOH) preparation can help differentiate psoriasis from candida or tinea. In psoriasis, a KOH test will be negative for fungal elements. Mycology culture on skin scrapings may be performed to rule out fungal infection. Erythrasma may exhibit a coral red appearance under Wood lamp examination.

While plaque-type psoriasis is the most common form, other patterns exist and may even occur simultaneously

If a lesion fails to respond to appropriate treatment, a careful drug history and biopsy can help clarify the diagnosis.

Document disease

It’s important to thoroughly document the extent and severity of the psoriasis and to monitor the impact of treatment. The Psoriasis Area and Severity Index is a commonly used method that calculates a score based on the area (extent) of involvement surrounding 4 major anatomical regions (head, upper extremities, trunk, and lower extremities), as well as the degree of erythema, induration, and scaling of lesions. The average redness, thickness, and scaling are graded on a scale of 0 to 4 and the extent of involvement is calculated to form a total numerical score ranging from 0 (no disease) to 72 (maximal disease).

Continue to: Many options in the treatment arsenal

 

 

Many options in the treatment arsenal

Many treatments can improve psoriasis.^9,15-19 Most affected individuals discover that emollients and exposure to natural sunlight can be effective, as are soothing baths (balneotherapy) or topical coal tar application. More persistent disease requires prescription therapy. Individualize therapy according to the severity of disease, location of the lesions, involvement of joints, and comorbidities (FIGURE 9).¹⁵

If ≤ 10% of the body surface area is involved, treatment options generally are explored in a stepwise progression from safest and most affordable to more involved therapies as needed: moisturization and avoidance of repetitive trauma, topical corticosteroids (TCS), vitamin D analogs, topical calcineurin inhibitors, and vitamin A creams. Recalcitrant disease will likely require ultraviolet (UV) light treatment or a systemic agent.¹⁵

If > 10% of the body surface area is involved, but joints are not involved, consider UV light treatment or a combination of alcitretin and TCS. If the joints are involved, likely initial options would be methotrexate, cyclosporine, or TNF-α inhibitor. Additional options to consider are anti-IL-17 or anti-IL-23 agents.¹⁵

If there’s joint involvement. In individuals with mild peripheral arthritis involving fewer than 4 joints without evidence of joint damage on imaging, nonsteroidal anti-inflammatory drugs are the mainstay of treatment. If the peripheral arthritis persists, or if it is associated with moderate-to-severe erosions or with substantial functional limitations, initiate treatment with a conventional disease-modifying antirheumatic drug. If the disease remains active, consider biologic agents.

Case studies

Mild-to-moderate psoriasis

Patient A is a 19-year-old woman presenting for evaluation of a persistently dry, flaking scalp. She has had the itchy scalp for years, as well as several small “patches” across her elbows, legs, knees, and abdomen. Over-the-counter emollients have not helped. The patient also says she has had brittle nails on several of her fingers, which she keeps covered with thick polish.

Continue to: The condition exemplified...

The condition exemplified by Patient A can typically be managed with topical products.

Topical steroids may be classified by different delivery vehicles, active ingredients, and potencies. The National Psoriasis Foundation's Topical Steroids Potency Chart can provide guidance (visit www.psoriasis.org/about-psoriasis/treatments/topicals/steroids/potency-chart and scroll down). Prescribing an appropriate amount is important; the standard 30-g prescription tube is generally required to cover the entire skin surface. Ointments have a greasy consistency (typically a petroleum base), which enhances potency and hydrates the skin. Creams and lotions are easier to rub on and spread. Gels are alcohol based and readily absorbed.¹⁶ Solutions, foams, and shampoos are particularly useful to treat psoriasis in hairy areas such as the scalp.

Corticosteroid potency ranges from Class I to Class VII, with the former being the most potent. While TCS products are typically effective with minimal systemic absorption, it is important to counsel patients on the risk of skin atrophy, impaired wound healing, and skin pigmentation changes with chronic use. With nail psoriasis, a potent topical steroid (including flurandrenolide [Cordran] tape) applied to the proximal nail fold has shown benefit.²⁰

Topical calcineurin inhibitors (TCIs; eg, tacrolimus ointment and pimecrolimus cream) are anti-inflammatory agents often used in conjunction with topical steroids to minimize steroid use and associated adverse effects.¹⁵ A possible steroid-sparing regimen includes using a TCI Monday through Friday and a topical steroid on the weekend.

Topical vitamin D analogs (calcipotriene, calcipotriol, calcitriol) inhibit proliferation of keratinocytes and decrease the production of inflammatory mediators.^15,17-19,21 Application of a vitamin D analog in combination with a high-potency TCS, systemic treatment, or phototherapy can provide greater efficacy, a more rapid onset of action, and less irritation than can the vitamin D analog used alone.²¹ If used in combination with UV light, apply topical vitamin D after the light therapy to prevent degradation.

Continue to: UV light therapy

UV light therapy is often used in ­cases refractory to topical therapy. Patients are typically prescribed 2 to 3 treatments per week with narrowband UVB (311-313 nm), the excimer laser (308 nm), or, less commonly, PUVA (UV treatment with psoralens). Treatment begins with a minimal erythema dose—the lowest dose to achieve minimal erythema of the skin before burning. When that is determined, exposure is increased as needed—depending on the response. If this is impractical or too time-consuming for the patient, an alternative recommendation would be increased exposure to natural sunlight or even use of a tanning booth. However, patients must then be cautioned about the increased risk of skin cancer.

Refractory/severe psoriasis

Patient B is a 35-year-old man with a longstanding history of psoriasis affecting his scalp and nails. Over the past 10 years, psoriatic lesions have also appeared and grown across his lower back, gluteal fold, legs, abdomen, and arms. He is now being evaluated by a rheumatologist for worsening symmetric joint pain that includes his lower back.

Methotrexate has been used to treat psoriasis and psoriatic arthritis since the 1950s. Methotrexate is a competitive inhibitor of dihydrofolate reductase and is typically given as an oral medication dosed once weekly with folic acid supplementation on the other 6 days.¹⁷ The most common adverse effects encountered with methotrexate are gastrointestinal upset and oral ulcers; however, routine monitoring for myelosuppression and hepatotoxicity is required.

Biologic therapy. When conventional therapies fail, immune-targeted treatment with “biologics” may be initiated. As knowledge of signaling pathways and the immunopathogenesis of psoriasis has increased, so has the number of biologic agents, which are generally well tolerated and effective in managing plaque psoriasis and psoriatic arthritis. Although their use, which requires monitoring, is handled primarily by specialists, familiarizing yourself with available agents can be helpful (TABLE).²²

Nutritional modification and supplementation in treating skin disease still requires further investigation. Fish oil has shown benefit for cutaneous psoriasis in randomized controlled trials.^7,8 Oral vitamin D supplementation requires further study, whereas selenium and B₁₂ supplementation have not conferred consistent benefit.⁷ Given that several studies have demonstrated a relationship between body mass index and psoriatic disease severity, weight loss may be helpful in the management of psoriasis as well as psoriatic arthritis.⁸

Continue to: Other systemic agents

Individualize therapy according to the severity of disease, location of the lesions, involvement of joints, and comorbidities.

Other systemic agents—for individuals who cannot tolerate the biologic agents—include acitretin, azathioprine, mycophenolate mofetil, and cyclosporine.^15,17

Paradoxical psoriatic reactions

When a psoriatic condition develops during biologic drug therapy, it is known as a paradoxical psoriatic reaction. The onset of de novo psoriasis has been documented during TNF-α inhibitor therapy for individuals with underlying rheumatoid arthritis.²³ Skin biopsy reveals the same findings as common plaque psoriasis.

Using immunosuppressive Tx? Screen for tuberculosis

Testing to exclude a diagnosis of latent or undiagnosed tuberculosis must be performed prior to initiating immunosuppressive therapy with methotrexate or a biologic agent. Tuberculin skin testing, QuantiFERON-TB gold test, and the T-SPOT.TB test are accepted screening modalities. Discordance between tuberculin skin tests and the interferon gamma release assays in latent TB highlights the need for further study using the available QuantiFERON-TB gold test and the T-SPOT.TB test.²⁴

CORRESPONDENCE
Karl T. Clebak, MD, FAAFP, Penn State Health Milton S. Hershey Medical Center, Department of Family and Community Medicine, 500 University Drive, Hershey, PA 17033; [email protected].

The “heartbreak of psoriasis,” coined by an advertiser in the 1960s, conveyed the notion that this disease was a cosmetic disorder mainly limited to skin involvement. John Updike’s article in the September 1985 issue of The New Yorker, “At War With My Skin,” detailed Mr. Updike’s feelings of isolation and stress related to his condition, helping to reframe the popular concept of psoriasis.¹ Updike’s eloquent account describing his struggles to find effective treatment increased public awareness about psoriasis, which in fact affects other body systems as well.

The overall prevalence of psoriasis is 1.5% to 3.1% in the United States and United Kingdom.^2,3 More than 6.5 million adults in the United States > 20 years of age are affected.³ The most commonly affected demographic group is non-­Hispanic Caucasians.

Our expanding knowledge of pathogenesis

Studies of genetic linkage have identified genes and single nucleotide polymorphisms associated with psoriasis.⁴ The interaction between environmental triggers and the innate and adaptive immune systems leads to keratinocyte hyperproliferation. Tumor necrosis factor (TNF), interleukin (IL) 23, and IL-17 are important cytokines associated with psoriatic inflammation.⁴ There are common pathways of inflammation in both psoriasis and cardiovascular disease resulting in oxidative stress and endothelial cell dysfunction.⁴ Ninety percent of early-onset psoriasis is associated with human leukocyte antigen (HLA)-Cw6.⁴ And alterations in the microbiome of the skin may contribute, as reduced microbial diversity has been found in psoriatic lesions.⁵

Comorbidities are common

Psoriasis is an independent risk factor for diabetes and major adverse cardiovascular events.⁶ Hypertension, dyslipidemia, inflammatory bowel disease, nonalcoholic fatty liver disease, chronic kidney disease, and lymphoma (particularly cutaneous T-cell lymphoma) are also associated with psoriasis.⁶ Psoriatic arthritis is frequently encountered with cutaneous psoriasis; however, it is often not recognized until late in the disease course.

There also appears to be an association among psoriasis, dietary factors, and celiac disease.^7-9 Positive testing for IgA anti-endomysial antibodies and IgA tissue transglutaminase antibodies should prompt consideration of starting a gluten-free diet, which has been shown to improve psoriatic lesions.⁹ In addition to its impact on physical health, cutaneous psoriasis often affects mental health. Increased anxiety, depression, and sleep disorders are commonly encountered, revealing the far-reaching effects of psoriasis. The persistent associated itch of psoriasis is often distressing and negatively impacts the patient’s quality of life.

The different types of psoriasis

The classic presentation of psoriasis involves stubborn plaques with silvery scale on extensor surfaces such as the elbows and knees. The severity of the disease corresponds with the amount of body surface area affected. While plaque-type psoriasis is the most common form, other patterns exist. Individuals may exhibit 1 dominant pattern or multiple psoriatic variants simultaneously. Most types of psoriasis have 3 characteristic features: erythema, skin thickening, and scales.

Certain history and physical clues can aid in diagnosing psoriasis; these include the Koebner phenomenon, the Auspitz sign, and the Woronoff ring. The Koebner phenomenon refers to the development of psoriatic lesions in an area of trauma (FIGURE 1), frequently resulting in a linear streak-like appearance. The Auspitz sign describes the pinpoint bleeding that may be encountered with the removal of a psoriatic plaque. The Woronoff ring is a pale blanching ring that may surround a psoriatic lesion.

Continue to: Chronic plaque-type psoriasis

Chronic plaque-type psoriasis (Figures 2A and 2B), the most common variant, is characterized by sharply demarcated pink papules and plaques with a silvery scale in a symmetric distribution on the extensor surfaces, scalp, trunk, and lumbosacral areas.

PHOTOS COURTESY OF JEFFREY J. MILLER, MD, MBA, PENN STATE COLLEGE OF MEDICINE, AND BRYAN E. ANDERSON, MD, PENN STATE COLLEGE OF MEDICINE, DEPARTMENT OF DERMATOLOGY, PA

Guttate psoriasis (FIGURE 3) features small (often < 1 cm) pink scaly papules that appear suddenly. It is more commonly seen in children and is usually preceded by an upper respiratory tract infection, often with Streptococcus.¹⁰ If strep testing is positive, guttate psoriasis may improve after appropriate antibiotic treatment.

PHOTO COURTESY OF JEFFREY J. MILLER, MD, MBA, PENN STATE COLLEGE OF MEDICINE, AND BRYAN E. ANDERSON, MD, PENN STATE COLLEGE OF MEDICINE, DEPARTMENT OF DERMATOLOGY, PA

Erythrodermic psoriasis (FIGUREs 4A and 4B) involves at least 75% of the body with erythema and scaling.¹¹ Erythroderma can be caused by many other conditions such as atopic dermatitis, a drug reaction, Sezary syndrome, seborrheic dermatitis, and pityriasis rubra pilaris. Treatments for other conditions in the differential diagnosis can potentially make psoriasis worse. Unfortunately, findings on a skin biopsy are often nonspecific, making careful clinical observation crucial to arriving at an accurate diagnosis.

PHOTOS COURTESY OF JEFFREY J. MILLER, MD, MBA, PENN STATE COLLEGE OF MEDICINE, AND BRYAN E. ANDERSON, MD, PENN STATE COLLEGE OF MEDICINE, DEPARTMENT OF DERMATOLOGY, PA

Pustular psoriasis is characterized by bright erythema and sterile pustules. Pustular psoriasis can be triggered by pregnancy, sudden tapering of corticosteroids, hypocalcemia, and infection. Involvement of the palms and soles with severe desquamation can drastically impact daily functioning and quality of life.

Inverse or flexural psoriasis (FIGUREs 5A and 5B) is characterized by shiny, pink-to-red sharply demarcated plaques involving intertriginous areas, typically the groin, inguinal crease, axilla, inframammary regions, and intergluteal cleft.

PHOTOS COURTESY OF JEFFREY J. MILLER, MD, MBA, PENN STATE COLLEGE OF MEDICINE, AND BRYAN E. ANDERSON, MD, PENN STATE COLLEGE OF MEDICINE, DEPARTMENT OF DERMATOLOGY, PA

Continue to: Geographic tongue

Geographic tongue describes psoriasis of the tongue. The mucosa of the tongue has white plaques with a geographic border. Instead of scale, the moisture on the tongue causes areas of hyperkeratosis that appear white.

Nail psoriasis can manifest as nail pitting (FIGURE 6), oil staining, onycholysis (distal lifting of the nail), and subungual hyperkeratosis. Nail psoriasis is often quite distressing for patients and can be difficult to treat.

PHOTO COURTESY OF JEFFREY J. MILLER, MD, MBA, PENN STATE COLLEGE OF MEDICINE, AND BRYAN E. ANDERSON, MD, PENN STATE COLLEGE OF MEDICINE, DEPARTMENT OF DERMATOLOGY, PA

Palmoplantar psoriasis (FIGUREs 7A and 7B) can be painful due to the involvement of the palms of the hands and soles of the feet. Lesions will either be similar to other psoriatic plaques with well-demarcated erythematous scaling lesions or involve thickening and scale without associated erythema.

PHOTOS COURTESY OF JEFFREY J. MILLER, MD, MBA, PENN STATE COLLEGE OF MEDICINE, AND BRYAN E. ANDERSON, MD, PENN STATE COLLEGE OF MEDICINE, DEPARTMENT OF DERMATOLOGY, PA

Psoriatic arthritis can cause significant joint damage and disability. Most affected individuals with psoriatic arthritis have a history of preceding skin disease.¹² There are no specific lab tests for psoriasis; radiologic studies can show bulky syndesmophytes, central and marginal erosions, and periostitis. Patterns of joint involvement are variable. Psoriatic arthritis is more likely to affect the distal interphalangeal joints than rheumatoid arthritis and is more likely to affect the metacarpophalangeal joints than osteoarthritis.¹³

Nail psoriasis is often quite distressing for patients and can be difficult to treat.

Psoriatic arthritis often progresses insidiously and is commonly described as causing discomfort rather than acute pain. Enthesitis, inflammation at the site where tendons or ligaments insert into the bone, is often present. Joint destruction may lead to the telescoping “opera glass” digit (FIGURE 8).

PHOTO COURTESY OF JEFFREY J. MILLER, MD, MBA, PENN STATE COLLEGE OF MEDICINE, AND BRYAN E. ANDERSON, MD, PENN STATE COLLEGE OF MEDICINE, DEPARTMENT OF DERMATOLOGY, PA

Continue to: Drug-provoked psoriasis

Drug-provoked psoriasis is divided into 2 groups: drug-induced and drug-­aggravated. Drug-induced psoriasis will improve after discontinuation of the causative drug and tends to occur in patients without a personal or family history of psoriasis. Drug-aggravated psoriasis continues to progress after the discontinuation of the offending drug and is more often seen in patients with a history of psoriasis.¹⁴ Drugs that most commonly provoke psoriasis are beta-blockers, lithium, and antimalarials.¹⁰ Other potentially aggravating agents include antibiotics, digoxin, and nonsteroidal anti-inflammatory drugs.¹⁰

Consider these skin disorders in the differential diagnosis

The diagnosis of psoriasis is usually clinical, and a skin biopsy is rarely needed. However, a range of other skin disorders should be kept in mind when considering the differential diagnosis.

Mycosis fungoides is a type of cutaneous T-cell lymphoma that forms erythematous plaques that may show wrinkling and epidermal atrophy in sun-protected sites. Onset usually occurs among the elderly.

Pityriasis rubra pilaris is characterized by salmon-colored patches that may have small areas of normal skin (“islands of sparing”), hyperkeratotic follicular papules, and hyperkeratosis of the palms and soles.

Seborrheic dermatitis, dandruff of the skin, usually involves the scalp and nasolabial areas and the T-zone of the face.

Continue to: Lichen planus

Lichen planus usually appears slightly more purple than psoriasis and typically involves the mouth, flexural surfaces of the wrists, genitals, and ankles.

Other conditions in the differential include pityriasis lichenoides chronica, which may be identified on skin biopsy. Inverse psoriasis can be difficult to differentiate from candida intertrigo, erythrasma, or tinea cruris.

A potassium hydroxide (KOH) preparation can help differentiate psoriasis from candida or tinea. In psoriasis, a KOH test will be negative for fungal elements. Mycology culture on skin scrapings may be performed to rule out fungal infection. Erythrasma may exhibit a coral red appearance under Wood lamp examination.

While plaque-type psoriasis is the most common form, other patterns exist and may even occur simultaneously

If a lesion fails to respond to appropriate treatment, a careful drug history and biopsy can help clarify the diagnosis.

Document disease

It’s important to thoroughly document the extent and severity of the psoriasis and to monitor the impact of treatment. The Psoriasis Area and Severity Index is a commonly used method that calculates a score based on the area (extent) of involvement surrounding 4 major anatomical regions (head, upper extremities, trunk, and lower extremities), as well as the degree of erythema, induration, and scaling of lesions. The average redness, thickness, and scaling are graded on a scale of 0 to 4 and the extent of involvement is calculated to form a total numerical score ranging from 0 (no disease) to 72 (maximal disease).

Continue to: Many options in the treatment arsenal

 

 

Many options in the treatment arsenal

Many treatments can improve psoriasis.^9,15-19 Most affected individuals discover that emollients and exposure to natural sunlight can be effective, as are soothing baths (balneotherapy) or topical coal tar application. More persistent disease requires prescription therapy. Individualize therapy according to the severity of disease, location of the lesions, involvement of joints, and comorbidities (FIGURE 9).¹⁵

If ≤ 10% of the body surface area is involved, treatment options generally are explored in a stepwise progression from safest and most affordable to more involved therapies as needed: moisturization and avoidance of repetitive trauma, topical corticosteroids (TCS), vitamin D analogs, topical calcineurin inhibitors, and vitamin A creams. Recalcitrant disease will likely require ultraviolet (UV) light treatment or a systemic agent.¹⁵

If > 10% of the body surface area is involved, but joints are not involved, consider UV light treatment or a combination of alcitretin and TCS. If the joints are involved, likely initial options would be methotrexate, cyclosporine, or TNF-α inhibitor. Additional options to consider are anti-IL-17 or anti-IL-23 agents.¹⁵

If there’s joint involvement. In individuals with mild peripheral arthritis involving fewer than 4 joints without evidence of joint damage on imaging, nonsteroidal anti-inflammatory drugs are the mainstay of treatment. If the peripheral arthritis persists, or if it is associated with moderate-to-severe erosions or with substantial functional limitations, initiate treatment with a conventional disease-modifying antirheumatic drug. If the disease remains active, consider biologic agents.

Case studies

Mild-to-moderate psoriasis

Patient A is a 19-year-old woman presenting for evaluation of a persistently dry, flaking scalp. She has had the itchy scalp for years, as well as several small “patches” across her elbows, legs, knees, and abdomen. Over-the-counter emollients have not helped. The patient also says she has had brittle nails on several of her fingers, which she keeps covered with thick polish.

Continue to: The condition exemplified...

The condition exemplified by Patient A can typically be managed with topical products.

Topical steroids may be classified by different delivery vehicles, active ingredients, and potencies. The National Psoriasis Foundation's Topical Steroids Potency Chart can provide guidance (visit www.psoriasis.org/about-psoriasis/treatments/topicals/steroids/potency-chart and scroll down). Prescribing an appropriate amount is important; the standard 30-g prescription tube is generally required to cover the entire skin surface. Ointments have a greasy consistency (typically a petroleum base), which enhances potency and hydrates the skin. Creams and lotions are easier to rub on and spread. Gels are alcohol based and readily absorbed.¹⁶ Solutions, foams, and shampoos are particularly useful to treat psoriasis in hairy areas such as the scalp.

Corticosteroid potency ranges from Class I to Class VII, with the former being the most potent. While TCS products are typically effective with minimal systemic absorption, it is important to counsel patients on the risk of skin atrophy, impaired wound healing, and skin pigmentation changes with chronic use. With nail psoriasis, a potent topical steroid (including flurandrenolide [Cordran] tape) applied to the proximal nail fold has shown benefit.²⁰

Topical calcineurin inhibitors (TCIs; eg, tacrolimus ointment and pimecrolimus cream) are anti-inflammatory agents often used in conjunction with topical steroids to minimize steroid use and associated adverse effects.¹⁵ A possible steroid-sparing regimen includes using a TCI Monday through Friday and a topical steroid on the weekend.

Topical vitamin D analogs (calcipotriene, calcipotriol, calcitriol) inhibit proliferation of keratinocytes and decrease the production of inflammatory mediators.^15,17-19,21 Application of a vitamin D analog in combination with a high-potency TCS, systemic treatment, or phototherapy can provide greater efficacy, a more rapid onset of action, and less irritation than can the vitamin D analog used alone.²¹ If used in combination with UV light, apply topical vitamin D after the light therapy to prevent degradation.

Continue to: UV light therapy

UV light therapy is often used in ­cases refractory to topical therapy. Patients are typically prescribed 2 to 3 treatments per week with narrowband UVB (311-313 nm), the excimer laser (308 nm), or, less commonly, PUVA (UV treatment with psoralens). Treatment begins with a minimal erythema dose—the lowest dose to achieve minimal erythema of the skin before burning. When that is determined, exposure is increased as needed—depending on the response. If this is impractical or too time-consuming for the patient, an alternative recommendation would be increased exposure to natural sunlight or even use of a tanning booth. However, patients must then be cautioned about the increased risk of skin cancer.

Refractory/severe psoriasis

Patient B is a 35-year-old man with a longstanding history of psoriasis affecting his scalp and nails. Over the past 10 years, psoriatic lesions have also appeared and grown across his lower back, gluteal fold, legs, abdomen, and arms. He is now being evaluated by a rheumatologist for worsening symmetric joint pain that includes his lower back.

Methotrexate has been used to treat psoriasis and psoriatic arthritis since the 1950s. Methotrexate is a competitive inhibitor of dihydrofolate reductase and is typically given as an oral medication dosed once weekly with folic acid supplementation on the other 6 days.¹⁷ The most common adverse effects encountered with methotrexate are gastrointestinal upset and oral ulcers; however, routine monitoring for myelosuppression and hepatotoxicity is required.

Biologic therapy. When conventional therapies fail, immune-targeted treatment with “biologics” may be initiated. As knowledge of signaling pathways and the immunopathogenesis of psoriasis has increased, so has the number of biologic agents, which are generally well tolerated and effective in managing plaque psoriasis and psoriatic arthritis. Although their use, which requires monitoring, is handled primarily by specialists, familiarizing yourself with available agents can be helpful (TABLE).²²

Nutritional modification and supplementation in treating skin disease still requires further investigation. Fish oil has shown benefit for cutaneous psoriasis in randomized controlled trials.^7,8 Oral vitamin D supplementation requires further study, whereas selenium and B₁₂ supplementation have not conferred consistent benefit.⁷ Given that several studies have demonstrated a relationship between body mass index and psoriatic disease severity, weight loss may be helpful in the management of psoriasis as well as psoriatic arthritis.⁸

Continue to: Other systemic agents

Individualize therapy according to the severity of disease, location of the lesions, involvement of joints, and comorbidities.

Other systemic agents—for individuals who cannot tolerate the biologic agents—include acitretin, azathioprine, mycophenolate mofetil, and cyclosporine.^15,17

Paradoxical psoriatic reactions

When a psoriatic condition develops during biologic drug therapy, it is known as a paradoxical psoriatic reaction. The onset of de novo psoriasis has been documented during TNF-α inhibitor therapy for individuals with underlying rheumatoid arthritis.²³ Skin biopsy reveals the same findings as common plaque psoriasis.

Using immunosuppressive Tx? Screen for tuberculosis

Testing to exclude a diagnosis of latent or undiagnosed tuberculosis must be performed prior to initiating immunosuppressive therapy with methotrexate or a biologic agent. Tuberculin skin testing, QuantiFERON-TB gold test, and the T-SPOT.TB test are accepted screening modalities. Discordance between tuberculin skin tests and the interferon gamma release assays in latent TB highlights the need for further study using the available QuantiFERON-TB gold test and the T-SPOT.TB test.²⁴

CORRESPONDENCE
Karl T. Clebak, MD, FAAFP, Penn State Health Milton S. Hershey Medical Center, Department of Family and Community Medicine, 500 University Drive, Hershey, PA 17033; [email protected].

The “heartbreak of psoriasis,” coined by an advertiser in the 1960s, conveyed the notion that this disease was a cosmetic disorder mainly limited to skin involvement. John Updike’s article in the September 1985 issue of The New Yorker, “At War With My Skin,” detailed Mr. Updike’s feelings of isolation and stress related to his condition, helping to reframe the popular concept of psoriasis.¹ Updike’s eloquent account describing his struggles to find effective treatment increased public awareness about psoriasis, which in fact affects other body systems as well.

The overall prevalence of psoriasis is 1.5% to 3.1% in the United States and United Kingdom.^2,3 More than 6.5 million adults in the United States > 20 years of age are affected.³ The most commonly affected demographic group is non-­Hispanic Caucasians.

Our expanding knowledge of pathogenesis

Studies of genetic linkage have identified genes and single nucleotide polymorphisms associated with psoriasis.⁴ The interaction between environmental triggers and the innate and adaptive immune systems leads to keratinocyte hyperproliferation. Tumor necrosis factor (TNF), interleukin (IL) 23, and IL-17 are important cytokines associated with psoriatic inflammation.⁴ There are common pathways of inflammation in both psoriasis and cardiovascular disease resulting in oxidative stress and endothelial cell dysfunction.⁴ Ninety percent of early-onset psoriasis is associated with human leukocyte antigen (HLA)-Cw6.⁴ And alterations in the microbiome of the skin may contribute, as reduced microbial diversity has been found in psoriatic lesions.⁵

Comorbidities are common

Psoriasis is an independent risk factor for diabetes and major adverse cardiovascular events.⁶ Hypertension, dyslipidemia, inflammatory bowel disease, nonalcoholic fatty liver disease, chronic kidney disease, and lymphoma (particularly cutaneous T-cell lymphoma) are also associated with psoriasis.⁶ Psoriatic arthritis is frequently encountered with cutaneous psoriasis; however, it is often not recognized until late in the disease course.

There also appears to be an association among psoriasis, dietary factors, and celiac disease.^7-9 Positive testing for IgA anti-endomysial antibodies and IgA tissue transglutaminase antibodies should prompt consideration of starting a gluten-free diet, which has been shown to improve psoriatic lesions.⁹ In addition to its impact on physical health, cutaneous psoriasis often affects mental health. Increased anxiety, depression, and sleep disorders are commonly encountered, revealing the far-reaching effects of psoriasis. The persistent associated itch of psoriasis is often distressing and negatively impacts the patient’s quality of life.

The different types of psoriasis

The classic presentation of psoriasis involves stubborn plaques with silvery scale on extensor surfaces such as the elbows and knees. The severity of the disease corresponds with the amount of body surface area affected. While plaque-type psoriasis is the most common form, other patterns exist. Individuals may exhibit 1 dominant pattern or multiple psoriatic variants simultaneously. Most types of psoriasis have 3 characteristic features: erythema, skin thickening, and scales.

Certain history and physical clues can aid in diagnosing psoriasis; these include the Koebner phenomenon, the Auspitz sign, and the Woronoff ring. The Koebner phenomenon refers to the development of psoriatic lesions in an area of trauma (FIGURE 1), frequently resulting in a linear streak-like appearance. The Auspitz sign describes the pinpoint bleeding that may be encountered with the removal of a psoriatic plaque. The Woronoff ring is a pale blanching ring that may surround a psoriatic lesion.

Continue to: Chronic plaque-type psoriasis

Chronic plaque-type psoriasis (Figures 2A and 2B), the most common variant, is characterized by sharply demarcated pink papules and plaques with a silvery scale in a symmetric distribution on the extensor surfaces, scalp, trunk, and lumbosacral areas.

PHOTOS COURTESY OF JEFFREY J. MILLER, MD, MBA, PENN STATE COLLEGE OF MEDICINE, AND BRYAN E. ANDERSON, MD, PENN STATE COLLEGE OF MEDICINE, DEPARTMENT OF DERMATOLOGY, PA

Guttate psoriasis (FIGURE 3) features small (often < 1 cm) pink scaly papules that appear suddenly. It is more commonly seen in children and is usually preceded by an upper respiratory tract infection, often with Streptococcus.¹⁰ If strep testing is positive, guttate psoriasis may improve after appropriate antibiotic treatment.

PHOTO COURTESY OF JEFFREY J. MILLER, MD, MBA, PENN STATE COLLEGE OF MEDICINE, AND BRYAN E. ANDERSON, MD, PENN STATE COLLEGE OF MEDICINE, DEPARTMENT OF DERMATOLOGY, PA

Erythrodermic psoriasis (FIGUREs 4A and 4B) involves at least 75% of the body with erythema and scaling.¹¹ Erythroderma can be caused by many other conditions such as atopic dermatitis, a drug reaction, Sezary syndrome, seborrheic dermatitis, and pityriasis rubra pilaris. Treatments for other conditions in the differential diagnosis can potentially make psoriasis worse. Unfortunately, findings on a skin biopsy are often nonspecific, making careful clinical observation crucial to arriving at an accurate diagnosis.

PHOTOS COURTESY OF JEFFREY J. MILLER, MD, MBA, PENN STATE COLLEGE OF MEDICINE, AND BRYAN E. ANDERSON, MD, PENN STATE COLLEGE OF MEDICINE, DEPARTMENT OF DERMATOLOGY, PA

Pustular psoriasis is characterized by bright erythema and sterile pustules. Pustular psoriasis can be triggered by pregnancy, sudden tapering of corticosteroids, hypocalcemia, and infection. Involvement of the palms and soles with severe desquamation can drastically impact daily functioning and quality of life.

Inverse or flexural psoriasis (FIGUREs 5A and 5B) is characterized by shiny, pink-to-red sharply demarcated plaques involving intertriginous areas, typically the groin, inguinal crease, axilla, inframammary regions, and intergluteal cleft.

PHOTOS COURTESY OF JEFFREY J. MILLER, MD, MBA, PENN STATE COLLEGE OF MEDICINE, AND BRYAN E. ANDERSON, MD, PENN STATE COLLEGE OF MEDICINE, DEPARTMENT OF DERMATOLOGY, PA

Continue to: Geographic tongue

Geographic tongue describes psoriasis of the tongue. The mucosa of the tongue has white plaques with a geographic border. Instead of scale, the moisture on the tongue causes areas of hyperkeratosis that appear white.

Nail psoriasis can manifest as nail pitting (FIGURE 6), oil staining, onycholysis (distal lifting of the nail), and subungual hyperkeratosis. Nail psoriasis is often quite distressing for patients and can be difficult to treat.

PHOTO COURTESY OF JEFFREY J. MILLER, MD, MBA, PENN STATE COLLEGE OF MEDICINE, AND BRYAN E. ANDERSON, MD, PENN STATE COLLEGE OF MEDICINE, DEPARTMENT OF DERMATOLOGY, PA

Palmoplantar psoriasis (FIGUREs 7A and 7B) can be painful due to the involvement of the palms of the hands and soles of the feet. Lesions will either be similar to other psoriatic plaques with well-demarcated erythematous scaling lesions or involve thickening and scale without associated erythema.

PHOTOS COURTESY OF JEFFREY J. MILLER, MD, MBA, PENN STATE COLLEGE OF MEDICINE, AND BRYAN E. ANDERSON, MD, PENN STATE COLLEGE OF MEDICINE, DEPARTMENT OF DERMATOLOGY, PA

Psoriatic arthritis can cause significant joint damage and disability. Most affected individuals with psoriatic arthritis have a history of preceding skin disease.¹² There are no specific lab tests for psoriasis; radiologic studies can show bulky syndesmophytes, central and marginal erosions, and periostitis. Patterns of joint involvement are variable. Psoriatic arthritis is more likely to affect the distal interphalangeal joints than rheumatoid arthritis and is more likely to affect the metacarpophalangeal joints than osteoarthritis.¹³

Nail psoriasis is often quite distressing for patients and can be difficult to treat.

Psoriatic arthritis often progresses insidiously and is commonly described as causing discomfort rather than acute pain. Enthesitis, inflammation at the site where tendons or ligaments insert into the bone, is often present. Joint destruction may lead to the telescoping “opera glass” digit (FIGURE 8).

PHOTO COURTESY OF JEFFREY J. MILLER, MD, MBA, PENN STATE COLLEGE OF MEDICINE, AND BRYAN E. ANDERSON, MD, PENN STATE COLLEGE OF MEDICINE, DEPARTMENT OF DERMATOLOGY, PA

Continue to: Drug-provoked psoriasis

Drug-provoked psoriasis is divided into 2 groups: drug-induced and drug-­aggravated. Drug-induced psoriasis will improve after discontinuation of the causative drug and tends to occur in patients without a personal or family history of psoriasis. Drug-aggravated psoriasis continues to progress after the discontinuation of the offending drug and is more often seen in patients with a history of psoriasis.¹⁴ Drugs that most commonly provoke psoriasis are beta-blockers, lithium, and antimalarials.¹⁰ Other potentially aggravating agents include antibiotics, digoxin, and nonsteroidal anti-inflammatory drugs.¹⁰

Consider these skin disorders in the differential diagnosis

The diagnosis of psoriasis is usually clinical, and a skin biopsy is rarely needed. However, a range of other skin disorders should be kept in mind when considering the differential diagnosis.

Mycosis fungoides is a type of cutaneous T-cell lymphoma that forms erythematous plaques that may show wrinkling and epidermal atrophy in sun-protected sites. Onset usually occurs among the elderly.

Pityriasis rubra pilaris is characterized by salmon-colored patches that may have small areas of normal skin (“islands of sparing”), hyperkeratotic follicular papules, and hyperkeratosis of the palms and soles.

Seborrheic dermatitis, dandruff of the skin, usually involves the scalp and nasolabial areas and the T-zone of the face.

Continue to: Lichen planus

Lichen planus usually appears slightly more purple than psoriasis and typically involves the mouth, flexural surfaces of the wrists, genitals, and ankles.

Other conditions in the differential include pityriasis lichenoides chronica, which may be identified on skin biopsy. Inverse psoriasis can be difficult to differentiate from candida intertrigo, erythrasma, or tinea cruris.

A potassium hydroxide (KOH) preparation can help differentiate psoriasis from candida or tinea. In psoriasis, a KOH test will be negative for fungal elements. Mycology culture on skin scrapings may be performed to rule out fungal infection. Erythrasma may exhibit a coral red appearance under Wood lamp examination.

While plaque-type psoriasis is the most common form, other patterns exist and may even occur simultaneously

If a lesion fails to respond to appropriate treatment, a careful drug history and biopsy can help clarify the diagnosis.

Document disease

It’s important to thoroughly document the extent and severity of the psoriasis and to monitor the impact of treatment. The Psoriasis Area and Severity Index is a commonly used method that calculates a score based on the area (extent) of involvement surrounding 4 major anatomical regions (head, upper extremities, trunk, and lower extremities), as well as the degree of erythema, induration, and scaling of lesions. The average redness, thickness, and scaling are graded on a scale of 0 to 4 and the extent of involvement is calculated to form a total numerical score ranging from 0 (no disease) to 72 (maximal disease).

Continue to: Many options in the treatment arsenal

 

 

Many options in the treatment arsenal

Many treatments can improve psoriasis.^9,15-19 Most affected individuals discover that emollients and exposure to natural sunlight can be effective, as are soothing baths (balneotherapy) or topical coal tar application. More persistent disease requires prescription therapy. Individualize therapy according to the severity of disease, location of the lesions, involvement of joints, and comorbidities (FIGURE 9).¹⁵

If ≤ 10% of the body surface area is involved, treatment options generally are explored in a stepwise progression from safest and most affordable to more involved therapies as needed: moisturization and avoidance of repetitive trauma, topical corticosteroids (TCS), vitamin D analogs, topical calcineurin inhibitors, and vitamin A creams. Recalcitrant disease will likely require ultraviolet (UV) light treatment or a systemic agent.¹⁵

If > 10% of the body surface area is involved, but joints are not involved, consider UV light treatment or a combination of alcitretin and TCS. If the joints are involved, likely initial options would be methotrexate, cyclosporine, or TNF-α inhibitor. Additional options to consider are anti-IL-17 or anti-IL-23 agents.¹⁵

If there’s joint involvement. In individuals with mild peripheral arthritis involving fewer than 4 joints without evidence of joint damage on imaging, nonsteroidal anti-inflammatory drugs are the mainstay of treatment. If the peripheral arthritis persists, or if it is associated with moderate-to-severe erosions or with substantial functional limitations, initiate treatment with a conventional disease-modifying antirheumatic drug. If the disease remains active, consider biologic agents.

Case studies

Mild-to-moderate psoriasis

Patient A is a 19-year-old woman presenting for evaluation of a persistently dry, flaking scalp. She has had the itchy scalp for years, as well as several small “patches” across her elbows, legs, knees, and abdomen. Over-the-counter emollients have not helped. The patient also says she has had brittle nails on several of her fingers, which she keeps covered with thick polish.

Continue to: The condition exemplified...

The condition exemplified by Patient A can typically be managed with topical products.

Topical steroids may be classified by different delivery vehicles, active ingredients, and potencies. The National Psoriasis Foundation's Topical Steroids Potency Chart can provide guidance (visit www.psoriasis.org/about-psoriasis/treatments/topicals/steroids/potency-chart and scroll down). Prescribing an appropriate amount is important; the standard 30-g prescription tube is generally required to cover the entire skin surface. Ointments have a greasy consistency (typically a petroleum base), which enhances potency and hydrates the skin. Creams and lotions are easier to rub on and spread. Gels are alcohol based and readily absorbed.¹⁶ Solutions, foams, and shampoos are particularly useful to treat psoriasis in hairy areas such as the scalp.

Corticosteroid potency ranges from Class I to Class VII, with the former being the most potent. While TCS products are typically effective with minimal systemic absorption, it is important to counsel patients on the risk of skin atrophy, impaired wound healing, and skin pigmentation changes with chronic use. With nail psoriasis, a potent topical steroid (including flurandrenolide [Cordran] tape) applied to the proximal nail fold has shown benefit.²⁰

Topical calcineurin inhibitors (TCIs; eg, tacrolimus ointment and pimecrolimus cream) are anti-inflammatory agents often used in conjunction with topical steroids to minimize steroid use and associated adverse effects.¹⁵ A possible steroid-sparing regimen includes using a TCI Monday through Friday and a topical steroid on the weekend.

Topical vitamin D analogs (calcipotriene, calcipotriol, calcitriol) inhibit proliferation of keratinocytes and decrease the production of inflammatory mediators.^15,17-19,21 Application of a vitamin D analog in combination with a high-potency TCS, systemic treatment, or phototherapy can provide greater efficacy, a more rapid onset of action, and less irritation than can the vitamin D analog used alone.²¹ If used in combination with UV light, apply topical vitamin D after the light therapy to prevent degradation.

Continue to: UV light therapy

UV light therapy is often used in ­cases refractory to topical therapy. Patients are typically prescribed 2 to 3 treatments per week with narrowband UVB (311-313 nm), the excimer laser (308 nm), or, less commonly, PUVA (UV treatment with psoralens). Treatment begins with a minimal erythema dose—the lowest dose to achieve minimal erythema of the skin before burning. When that is determined, exposure is increased as needed—depending on the response. If this is impractical or too time-consuming for the patient, an alternative recommendation would be increased exposure to natural sunlight or even use of a tanning booth. However, patients must then be cautioned about the increased risk of skin cancer.

Refractory/severe psoriasis

Patient B is a 35-year-old man with a longstanding history of psoriasis affecting his scalp and nails. Over the past 10 years, psoriatic lesions have also appeared and grown across his lower back, gluteal fold, legs, abdomen, and arms. He is now being evaluated by a rheumatologist for worsening symmetric joint pain that includes his lower back.

Methotrexate has been used to treat psoriasis and psoriatic arthritis since the 1950s. Methotrexate is a competitive inhibitor of dihydrofolate reductase and is typically given as an oral medication dosed once weekly with folic acid supplementation on the other 6 days.¹⁷ The most common adverse effects encountered with methotrexate are gastrointestinal upset and oral ulcers; however, routine monitoring for myelosuppression and hepatotoxicity is required.

Biologic therapy. When conventional therapies fail, immune-targeted treatment with “biologics” may be initiated. As knowledge of signaling pathways and the immunopathogenesis of psoriasis has increased, so has the number of biologic agents, which are generally well tolerated and effective in managing plaque psoriasis and psoriatic arthritis. Although their use, which requires monitoring, is handled primarily by specialists, familiarizing yourself with available agents can be helpful (TABLE).²²

Nutritional modification and supplementation in treating skin disease still requires further investigation. Fish oil has shown benefit for cutaneous psoriasis in randomized controlled trials.^7,8 Oral vitamin D supplementation requires further study, whereas selenium and B₁₂ supplementation have not conferred consistent benefit.⁷ Given that several studies have demonstrated a relationship between body mass index and psoriatic disease severity, weight loss may be helpful in the management of psoriasis as well as psoriatic arthritis.⁸

Continue to: Other systemic agents

Individualize therapy according to the severity of disease, location of the lesions, involvement of joints, and comorbidities.

Other systemic agents—for individuals who cannot tolerate the biologic agents—include acitretin, azathioprine, mycophenolate mofetil, and cyclosporine.^15,17

Paradoxical psoriatic reactions

When a psoriatic condition develops during biologic drug therapy, it is known as a paradoxical psoriatic reaction. The onset of de novo psoriasis has been documented during TNF-α inhibitor therapy for individuals with underlying rheumatoid arthritis.²³ Skin biopsy reveals the same findings as common plaque psoriasis.

Using immunosuppressive Tx? Screen for tuberculosis

Testing to exclude a diagnosis of latent or undiagnosed tuberculosis must be performed prior to initiating immunosuppressive therapy with methotrexate or a biologic agent. Tuberculin skin testing, QuantiFERON-TB gold test, and the T-SPOT.TB test are accepted screening modalities. Discordance between tuberculin skin tests and the interferon gamma release assays in latent TB highlights the need for further study using the available QuantiFERON-TB gold test and the T-SPOT.TB test.²⁴

CORRESPONDENCE
Karl T. Clebak, MD, FAAFP, Penn State Health Milton S. Hershey Medical Center, Department of Family and Community Medicine, 500 University Drive, Hershey, PA 17033; [email protected].

Based on the clinical appearance of hyperpigmented and hypopigmented scaly plaques in sun-exposed facial areas (with associated scarring and follicular plugging in affected lesions), the patient was given a diagnosis of discoid lupus erythematosus. The diagnosis was confirmed with a punch biopsy that showed characteristic interface dermatitis with superficial and deep perivascular and peri-adnexal lymphocytes. Direct immunofluorescence showed a band of C3 at the dermo-epidermal junction, consistent with various forms of cutaneous lupus.

A review of systems was negative for signs of systemic disease, including a lack of weakness, joint pain/swelling, fever, or known blood clots. An antinuclear antibody panel was also negative, largely excluding systemic disease.

Discoid lupus erythematosus is a form of cutaneous lupus. Patients often are genetically predisposed to autoimmune disease, and disease may be triggered by sun exposure. Up to 80% of patients develop lesions that are limited to the head and neck. Up to 25% of patients develop systemic lupus erythematosus that may occur months—or even decades—after the initial diagnosis. Lesions may lead to longstanding scars; this cannot always be prevented.

Two- to 3-week trials of topical potent or superpotent steroids applied to affected plaques may lead to clearance. Additionally, lesions may be treated with intralesional triamcinolone 3 mg/mL to 10 mg/mL and repeated every 3 to 4 weeks. Systemic therapies include hydroxychloroquine, chloroquine, retinoids, steroid sparing immunomodulators, and rarely prednisone.

This patient tolerated topical therapy well and though some scars remained, he was able to control flares with 2- to 3-week courses of clobetasol 0.05% twice daily. He is followed 2 to 3 times annually and has not developed signs or serologic findings of systemic disease over several years.

‌

Photos and text for Photo Rounds Friday courtesy of Jonathan Karnes, MD (copyright retained). Dr. Karnes is the medical director of MDFMR Dermatology Services, Augusta, ME.

Based on the clinical appearance of hyperpigmented and hypopigmented scaly plaques in sun-exposed facial areas (with associated scarring and follicular plugging in affected lesions), the patient was given a diagnosis of discoid lupus erythematosus. The diagnosis was confirmed with a punch biopsy that showed characteristic interface dermatitis with superficial and deep perivascular and peri-adnexal lymphocytes. Direct immunofluorescence showed a band of C3 at the dermo-epidermal junction, consistent with various forms of cutaneous lupus.

A review of systems was negative for signs of systemic disease, including a lack of weakness, joint pain/swelling, fever, or known blood clots. An antinuclear antibody panel was also negative, largely excluding systemic disease.

Discoid lupus erythematosus is a form of cutaneous lupus. Patients often are genetically predisposed to autoimmune disease, and disease may be triggered by sun exposure. Up to 80% of patients develop lesions that are limited to the head and neck. Up to 25% of patients develop systemic lupus erythematosus that may occur months—or even decades—after the initial diagnosis. Lesions may lead to longstanding scars; this cannot always be prevented.

Two- to 3-week trials of topical potent or superpotent steroids applied to affected plaques may lead to clearance. Additionally, lesions may be treated with intralesional triamcinolone 3 mg/mL to 10 mg/mL and repeated every 3 to 4 weeks. Systemic therapies include hydroxychloroquine, chloroquine, retinoids, steroid sparing immunomodulators, and rarely prednisone.

This patient tolerated topical therapy well and though some scars remained, he was able to control flares with 2- to 3-week courses of clobetasol 0.05% twice daily. He is followed 2 to 3 times annually and has not developed signs or serologic findings of systemic disease over several years.

‌

Photos and text for Photo Rounds Friday courtesy of Jonathan Karnes, MD (copyright retained). Dr. Karnes is the medical director of MDFMR Dermatology Services, Augusta, ME.

Based on the clinical appearance of hyperpigmented and hypopigmented scaly plaques in sun-exposed facial areas (with associated scarring and follicular plugging in affected lesions), the patient was given a diagnosis of discoid lupus erythematosus. The diagnosis was confirmed with a punch biopsy that showed characteristic interface dermatitis with superficial and deep perivascular and peri-adnexal lymphocytes. Direct immunofluorescence showed a band of C3 at the dermo-epidermal junction, consistent with various forms of cutaneous lupus.

A review of systems was negative for signs of systemic disease, including a lack of weakness, joint pain/swelling, fever, or known blood clots. An antinuclear antibody panel was also negative, largely excluding systemic disease.

Discoid lupus erythematosus is a form of cutaneous lupus. Patients often are genetically predisposed to autoimmune disease, and disease may be triggered by sun exposure. Up to 80% of patients develop lesions that are limited to the head and neck. Up to 25% of patients develop systemic lupus erythematosus that may occur months—or even decades—after the initial diagnosis. Lesions may lead to longstanding scars; this cannot always be prevented.

Two- to 3-week trials of topical potent or superpotent steroids applied to affected plaques may lead to clearance. Additionally, lesions may be treated with intralesional triamcinolone 3 mg/mL to 10 mg/mL and repeated every 3 to 4 weeks. Systemic therapies include hydroxychloroquine, chloroquine, retinoids, steroid sparing immunomodulators, and rarely prednisone.

This patient tolerated topical therapy well and though some scars remained, he was able to control flares with 2- to 3-week courses of clobetasol 0.05% twice daily. He is followed 2 to 3 times annually and has not developed signs or serologic findings of systemic disease over several years.

‌

Photos and text for Photo Rounds Friday courtesy of Jonathan Karnes, MD (copyright retained). Dr. Karnes is the medical director of MDFMR Dermatology Services, Augusta, ME.

In a survey of products labeled as hypoallergenic for children, about half of shampoos and almost 44% of soaps contained cocamidopropyl betaine (CAPB), a suspected sensitizer for hypersensitivity reactions in people with atopic dermatitis (AD) and allergic contact dermatitis, according to a research letter in the Journal of the American Academy of Dermatology.

Pirotehnik/iStock/Getty Images

In the letter, the authors, Reid W. Collis, of Washington University in St. Louis, and David M. Sheinbein, MD, of the division of dermatology at the university, referred to a previous study showing an association between contact sensitivity with CAPB and people with a history of AD. This was supported by the results of their own recent study in pediatric patients, they wrote, which found that reactions to CAPB were “exclusively” in patients with AD.

In the survey, they looked at children’s shampoo and soap products available on online databases of six of the biggest retailers, and analyzed the top 20 best-selling products for each retailer in 2018. Of the unique products, CAPB was found to be an ingredient in 52% (39 of 75) of the shampoos and 44% (29 of 66) of the soap products. But each of these products “contained the term ‘hypoallergenic; on the product itself or in the product’s description,” they noted.

“CAPB is a prevalent sensitizer in pediatric patients and should be avoided in patients with AD,” the investigators wrote. That said, it’s not included among the 35 prevalent allergens in the T.R.U.E. test, and they recommended that pediatricians and dermatologists “be aware of common products containing CAPB when counseling patients about their product choices,” considering that CAPB sensitivity is more likely in patients with AD.

The study had no funding source, and the authors had no disclosures.

[email protected]

SOURCE: Cho SI et al. J Am Acad Dermatol. 2020 May. doi: 10.1016/j.jaad.2019.12.036.

In a survey of products labeled as hypoallergenic for children, about half of shampoos and almost 44% of soaps contained cocamidopropyl betaine (CAPB), a suspected sensitizer for hypersensitivity reactions in people with atopic dermatitis (AD) and allergic contact dermatitis, according to a research letter in the Journal of the American Academy of Dermatology.

Pirotehnik/iStock/Getty Images

In the letter, the authors, Reid W. Collis, of Washington University in St. Louis, and David M. Sheinbein, MD, of the division of dermatology at the university, referred to a previous study showing an association between contact sensitivity with CAPB and people with a history of AD. This was supported by the results of their own recent study in pediatric patients, they wrote, which found that reactions to CAPB were “exclusively” in patients with AD.

In the survey, they looked at children’s shampoo and soap products available on online databases of six of the biggest retailers, and analyzed the top 20 best-selling products for each retailer in 2018. Of the unique products, CAPB was found to be an ingredient in 52% (39 of 75) of the shampoos and 44% (29 of 66) of the soap products. But each of these products “contained the term ‘hypoallergenic; on the product itself or in the product’s description,” they noted.

“CAPB is a prevalent sensitizer in pediatric patients and should be avoided in patients with AD,” the investigators wrote. That said, it’s not included among the 35 prevalent allergens in the T.R.U.E. test, and they recommended that pediatricians and dermatologists “be aware of common products containing CAPB when counseling patients about their product choices,” considering that CAPB sensitivity is more likely in patients with AD.

The study had no funding source, and the authors had no disclosures.

[email protected]

SOURCE: Cho SI et al. J Am Acad Dermatol. 2020 May. doi: 10.1016/j.jaad.2019.12.036.

In a survey of products labeled as hypoallergenic for children, about half of shampoos and almost 44% of soaps contained cocamidopropyl betaine (CAPB), a suspected sensitizer for hypersensitivity reactions in people with atopic dermatitis (AD) and allergic contact dermatitis, according to a research letter in the Journal of the American Academy of Dermatology.

Pirotehnik/iStock/Getty Images

In the letter, the authors, Reid W. Collis, of Washington University in St. Louis, and David M. Sheinbein, MD, of the division of dermatology at the university, referred to a previous study showing an association between contact sensitivity with CAPB and people with a history of AD. This was supported by the results of their own recent study in pediatric patients, they wrote, which found that reactions to CAPB were “exclusively” in patients with AD.

In the survey, they looked at children’s shampoo and soap products available on online databases of six of the biggest retailers, and analyzed the top 20 best-selling products for each retailer in 2018. Of the unique products, CAPB was found to be an ingredient in 52% (39 of 75) of the shampoos and 44% (29 of 66) of the soap products. But each of these products “contained the term ‘hypoallergenic; on the product itself or in the product’s description,” they noted.

“CAPB is a prevalent sensitizer in pediatric patients and should be avoided in patients with AD,” the investigators wrote. That said, it’s not included among the 35 prevalent allergens in the T.R.U.E. test, and they recommended that pediatricians and dermatologists “be aware of common products containing CAPB when counseling patients about their product choices,” considering that CAPB sensitivity is more likely in patients with AD.

The study had no funding source, and the authors had no disclosures.

[email protected]

SOURCE: Cho SI et al. J Am Acad Dermatol. 2020 May. doi: 10.1016/j.jaad.2019.12.036.