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Tease out genetic and structural causes of children’s hair loss
according to Maria Hordinsky, MD, of the University of Minnesota, Minneapolis.
The ectodermal dysplasias are a heterogeneous group of disorders in which a main feature is the absent, incomplete, or delayed development of one or more of the appendages derived from ectoderm, such as the hair follicle, Dr. Hordinsky said in a presentation at Skin Disease Education Foundation’s Women’s & Pediatric Dermatology Seminar.
Patients with pure hair and nail ectodermal dysplasia generally present with absent or sparse eyebrows and eyelashes, as well as follicular papules on the scalp and fragile, irregular hair, Dr. Hordinsky said. The condition is caused by a mutation in a gene associated with the production of keratin. In another rare form of hereditary hair loss – hypotrichosis simplex – patients are born with normal hair but lose it gradually from the scalp during the middle of the first decade of life.
The inability to grow long hair characterizes short anagen syndrome, a congenital disorder not to be confused with loose anagen syndrome, Dr. Hordinsky said. Patients with short anagen syndrome experience an idiopathic short anagen phase and as a result, an increased number of hairs in the telogen phase. Children with short anagen syndrome have unusually short hair in early childhood. “Parents typically complain that their children exhibit short hair even though they have never had a haircut,” she explained.
Trichothiodystrophy, a rare autosomal recessive disease, is distinguished by hair that is brittle and sulfur deficient, Dr. Hordinsky said. She cited a review of 112 patients with trichothiodystrophy in which additional distinguishing features included developmental delay/intellectual impairment (86%), short stature (73%), and ichthyosis (65%).
Some cases of hair loss in children have a structural basis, Dr. Hordinsky noted. Structural hair abnormalities include fractures of the hair shaft, extraneous matter on the hair shaft, and hair shaft irregularities such as coiling or twisting, she said.
In trichoptilosis, extensive cuticle loss results in fraying and splitting of the hair shaft, while in patients with trichoclasis, a fractured hair is splinted by a partially intact cuticle.
In trichorrhexis nodosa, the most common type of structural hair abnormality, “intact nodes [of hair] resemble two paintbrushes thrust together,” Dr. Hordinsky explained. Trichorrhexis nodosa may be congenital or acquired, and occurs in children with mental retardation and argininosuccinic aciduria, she said.
A hair shaft abnormality is the culprit behind uncombable hair syndrome, which can be inherited or can occur sporadically, Dr. Hordinsky said. The key feature of the condition is unruly hair caused by a distinctive hair shaft defect, “possibly related to an abnormality in the inner root sheath.” Abnormal hairs usually become apparent at about 3-4 years of age, but eyebrows and eyelashes appear normal. Many patients have a silvery blonde tint to their hair because of how the abnormal hairs reflect light, she said.
Dr. Hordinsky is a consultant for P&G, Concert, Cassiopea, and BioAZ; and receives grant/research support from Aclaris, Allergan, and the National Alopecia Areata Foundation. SDEF and this news organization are owned by Frontline Medical Communications.
according to Maria Hordinsky, MD, of the University of Minnesota, Minneapolis.
The ectodermal dysplasias are a heterogeneous group of disorders in which a main feature is the absent, incomplete, or delayed development of one or more of the appendages derived from ectoderm, such as the hair follicle, Dr. Hordinsky said in a presentation at Skin Disease Education Foundation’s Women’s & Pediatric Dermatology Seminar.
Patients with pure hair and nail ectodermal dysplasia generally present with absent or sparse eyebrows and eyelashes, as well as follicular papules on the scalp and fragile, irregular hair, Dr. Hordinsky said. The condition is caused by a mutation in a gene associated with the production of keratin. In another rare form of hereditary hair loss – hypotrichosis simplex – patients are born with normal hair but lose it gradually from the scalp during the middle of the first decade of life.
The inability to grow long hair characterizes short anagen syndrome, a congenital disorder not to be confused with loose anagen syndrome, Dr. Hordinsky said. Patients with short anagen syndrome experience an idiopathic short anagen phase and as a result, an increased number of hairs in the telogen phase. Children with short anagen syndrome have unusually short hair in early childhood. “Parents typically complain that their children exhibit short hair even though they have never had a haircut,” she explained.
Trichothiodystrophy, a rare autosomal recessive disease, is distinguished by hair that is brittle and sulfur deficient, Dr. Hordinsky said. She cited a review of 112 patients with trichothiodystrophy in which additional distinguishing features included developmental delay/intellectual impairment (86%), short stature (73%), and ichthyosis (65%).
Some cases of hair loss in children have a structural basis, Dr. Hordinsky noted. Structural hair abnormalities include fractures of the hair shaft, extraneous matter on the hair shaft, and hair shaft irregularities such as coiling or twisting, she said.
In trichoptilosis, extensive cuticle loss results in fraying and splitting of the hair shaft, while in patients with trichoclasis, a fractured hair is splinted by a partially intact cuticle.
In trichorrhexis nodosa, the most common type of structural hair abnormality, “intact nodes [of hair] resemble two paintbrushes thrust together,” Dr. Hordinsky explained. Trichorrhexis nodosa may be congenital or acquired, and occurs in children with mental retardation and argininosuccinic aciduria, she said.
A hair shaft abnormality is the culprit behind uncombable hair syndrome, which can be inherited or can occur sporadically, Dr. Hordinsky said. The key feature of the condition is unruly hair caused by a distinctive hair shaft defect, “possibly related to an abnormality in the inner root sheath.” Abnormal hairs usually become apparent at about 3-4 years of age, but eyebrows and eyelashes appear normal. Many patients have a silvery blonde tint to their hair because of how the abnormal hairs reflect light, she said.
Dr. Hordinsky is a consultant for P&G, Concert, Cassiopea, and BioAZ; and receives grant/research support from Aclaris, Allergan, and the National Alopecia Areata Foundation. SDEF and this news organization are owned by Frontline Medical Communications.
according to Maria Hordinsky, MD, of the University of Minnesota, Minneapolis.
The ectodermal dysplasias are a heterogeneous group of disorders in which a main feature is the absent, incomplete, or delayed development of one or more of the appendages derived from ectoderm, such as the hair follicle, Dr. Hordinsky said in a presentation at Skin Disease Education Foundation’s Women’s & Pediatric Dermatology Seminar.
Patients with pure hair and nail ectodermal dysplasia generally present with absent or sparse eyebrows and eyelashes, as well as follicular papules on the scalp and fragile, irregular hair, Dr. Hordinsky said. The condition is caused by a mutation in a gene associated with the production of keratin. In another rare form of hereditary hair loss – hypotrichosis simplex – patients are born with normal hair but lose it gradually from the scalp during the middle of the first decade of life.
The inability to grow long hair characterizes short anagen syndrome, a congenital disorder not to be confused with loose anagen syndrome, Dr. Hordinsky said. Patients with short anagen syndrome experience an idiopathic short anagen phase and as a result, an increased number of hairs in the telogen phase. Children with short anagen syndrome have unusually short hair in early childhood. “Parents typically complain that their children exhibit short hair even though they have never had a haircut,” she explained.
Trichothiodystrophy, a rare autosomal recessive disease, is distinguished by hair that is brittle and sulfur deficient, Dr. Hordinsky said. She cited a review of 112 patients with trichothiodystrophy in which additional distinguishing features included developmental delay/intellectual impairment (86%), short stature (73%), and ichthyosis (65%).
Some cases of hair loss in children have a structural basis, Dr. Hordinsky noted. Structural hair abnormalities include fractures of the hair shaft, extraneous matter on the hair shaft, and hair shaft irregularities such as coiling or twisting, she said.
In trichoptilosis, extensive cuticle loss results in fraying and splitting of the hair shaft, while in patients with trichoclasis, a fractured hair is splinted by a partially intact cuticle.
In trichorrhexis nodosa, the most common type of structural hair abnormality, “intact nodes [of hair] resemble two paintbrushes thrust together,” Dr. Hordinsky explained. Trichorrhexis nodosa may be congenital or acquired, and occurs in children with mental retardation and argininosuccinic aciduria, she said.
A hair shaft abnormality is the culprit behind uncombable hair syndrome, which can be inherited or can occur sporadically, Dr. Hordinsky said. The key feature of the condition is unruly hair caused by a distinctive hair shaft defect, “possibly related to an abnormality in the inner root sheath.” Abnormal hairs usually become apparent at about 3-4 years of age, but eyebrows and eyelashes appear normal. Many patients have a silvery blonde tint to their hair because of how the abnormal hairs reflect light, she said.
Dr. Hordinsky is a consultant for P&G, Concert, Cassiopea, and BioAZ; and receives grant/research support from Aclaris, Allergan, and the National Alopecia Areata Foundation. SDEF and this news organization are owned by Frontline Medical Communications.
FROM SDEF WOMEN’S & PEDIATRIC DERMATOLOGY SEMINAR
Advise parents on validity of AD-associated conditions
including allergic rhinitis and asthma, according to Douglas W. Kress, MD, of the department of dermatology at the University of Pittsburgh.
Recent studies suggest that atopic dermatitis (AD) affects 10%-17% of the U.S. population, and 80%-90% of patients are diagnosed by the age of 5 years, Dr. Kress said in a presentation at Skin Disease Education Foundation’s Women’s & Pediatric Dermatology Seminar.
“There seem to be multiple pathways, which initiate and perpetuate the cutaneous inflammation of AD including exposure to allergens, irritants, and physical trauma, infection, stress, extremes in temperature and humidity,” Dr. Kress said. In addition, foods and airborne allergens may trigger AD.
Many parents may believe that certain factors are associated with AD, but most of these perceptions are not supported by evidence, said Dr. Kress, who is also chief of the division of pediatric dermatology at the Children’s Hospital of Pittsburgh. AD appears to be a disorder of T cell dysregulation dominated by Th2 lesions in acute cases and Th1 inflammation in patients with chronic lesions.
No associations have been proven between the development of AD in the first 18 months of life and any maternal dietary restrictions, according to a recent Cochrane review, nor is there evidence for an association between AD and the introduction of solid foods, exposure to fish oil, or exposure to animals at a young age, he said. In addition, a study published in 2016 showed a lack of evidence to support the use of specific allergen immunotherapy for AD.
However, evidence does support an association between the presence of AD in children and certain other conditions, Dr. Kress said. “Other associations include an increased incidence of alopecia areata, a threefold increase in autism spectrum disorders, and a twofold increase in ADHD in children with atopic dermatitis.”
The only known food allergy linked to AD severity is egg whites; reducing egg white exposure has been shown to improve AD in children with both conditions, he noted.
Although many patients with AD experience annoying but relatively mild symptoms, health care providers should be alert to the potential for infections, particularly with Staphylococcus aureus, and remember that an active egg white allergy has been associated with staphylococcal superantigen sensitization, said Dr. Kress. The increased risk for S. aureus in children with AD may stem from a tendency to underuse antibiotics in AD children, which results in a delayed treatment until the infection becomes overt. In addition, the increased pH in patients with AD might promote the development of pathogenic strains of staph. However, ceramide-based moisturizers could help inhibit these strains by increasing skin acidity.
For patients who have poor AD control with standard therapy, antibiotics may be used as adjunctive therapy. “Consider bleach baths and/or staph decolonization with mupirocin, both of which led to significant improvement in eczema severity compared to placebo,” Dr. Kress said. “Bleach may also have an anti-inflammatory effect.”
Dr. Kress disclosed relationships with Pfizer, Amgen, and Sanofi/Regeneron. SDEF and this news organization are owned by Frontline Medical Communications.
including allergic rhinitis and asthma, according to Douglas W. Kress, MD, of the department of dermatology at the University of Pittsburgh.
Recent studies suggest that atopic dermatitis (AD) affects 10%-17% of the U.S. population, and 80%-90% of patients are diagnosed by the age of 5 years, Dr. Kress said in a presentation at Skin Disease Education Foundation’s Women’s & Pediatric Dermatology Seminar.
“There seem to be multiple pathways, which initiate and perpetuate the cutaneous inflammation of AD including exposure to allergens, irritants, and physical trauma, infection, stress, extremes in temperature and humidity,” Dr. Kress said. In addition, foods and airborne allergens may trigger AD.
Many parents may believe that certain factors are associated with AD, but most of these perceptions are not supported by evidence, said Dr. Kress, who is also chief of the division of pediatric dermatology at the Children’s Hospital of Pittsburgh. AD appears to be a disorder of T cell dysregulation dominated by Th2 lesions in acute cases and Th1 inflammation in patients with chronic lesions.
No associations have been proven between the development of AD in the first 18 months of life and any maternal dietary restrictions, according to a recent Cochrane review, nor is there evidence for an association between AD and the introduction of solid foods, exposure to fish oil, or exposure to animals at a young age, he said. In addition, a study published in 2016 showed a lack of evidence to support the use of specific allergen immunotherapy for AD.
However, evidence does support an association between the presence of AD in children and certain other conditions, Dr. Kress said. “Other associations include an increased incidence of alopecia areata, a threefold increase in autism spectrum disorders, and a twofold increase in ADHD in children with atopic dermatitis.”
The only known food allergy linked to AD severity is egg whites; reducing egg white exposure has been shown to improve AD in children with both conditions, he noted.
Although many patients with AD experience annoying but relatively mild symptoms, health care providers should be alert to the potential for infections, particularly with Staphylococcus aureus, and remember that an active egg white allergy has been associated with staphylococcal superantigen sensitization, said Dr. Kress. The increased risk for S. aureus in children with AD may stem from a tendency to underuse antibiotics in AD children, which results in a delayed treatment until the infection becomes overt. In addition, the increased pH in patients with AD might promote the development of pathogenic strains of staph. However, ceramide-based moisturizers could help inhibit these strains by increasing skin acidity.
For patients who have poor AD control with standard therapy, antibiotics may be used as adjunctive therapy. “Consider bleach baths and/or staph decolonization with mupirocin, both of which led to significant improvement in eczema severity compared to placebo,” Dr. Kress said. “Bleach may also have an anti-inflammatory effect.”
Dr. Kress disclosed relationships with Pfizer, Amgen, and Sanofi/Regeneron. SDEF and this news organization are owned by Frontline Medical Communications.
including allergic rhinitis and asthma, according to Douglas W. Kress, MD, of the department of dermatology at the University of Pittsburgh.
Recent studies suggest that atopic dermatitis (AD) affects 10%-17% of the U.S. population, and 80%-90% of patients are diagnosed by the age of 5 years, Dr. Kress said in a presentation at Skin Disease Education Foundation’s Women’s & Pediatric Dermatology Seminar.
“There seem to be multiple pathways, which initiate and perpetuate the cutaneous inflammation of AD including exposure to allergens, irritants, and physical trauma, infection, stress, extremes in temperature and humidity,” Dr. Kress said. In addition, foods and airborne allergens may trigger AD.
Many parents may believe that certain factors are associated with AD, but most of these perceptions are not supported by evidence, said Dr. Kress, who is also chief of the division of pediatric dermatology at the Children’s Hospital of Pittsburgh. AD appears to be a disorder of T cell dysregulation dominated by Th2 lesions in acute cases and Th1 inflammation in patients with chronic lesions.
No associations have been proven between the development of AD in the first 18 months of life and any maternal dietary restrictions, according to a recent Cochrane review, nor is there evidence for an association between AD and the introduction of solid foods, exposure to fish oil, or exposure to animals at a young age, he said. In addition, a study published in 2016 showed a lack of evidence to support the use of specific allergen immunotherapy for AD.
However, evidence does support an association between the presence of AD in children and certain other conditions, Dr. Kress said. “Other associations include an increased incidence of alopecia areata, a threefold increase in autism spectrum disorders, and a twofold increase in ADHD in children with atopic dermatitis.”
The only known food allergy linked to AD severity is egg whites; reducing egg white exposure has been shown to improve AD in children with both conditions, he noted.
Although many patients with AD experience annoying but relatively mild symptoms, health care providers should be alert to the potential for infections, particularly with Staphylococcus aureus, and remember that an active egg white allergy has been associated with staphylococcal superantigen sensitization, said Dr. Kress. The increased risk for S. aureus in children with AD may stem from a tendency to underuse antibiotics in AD children, which results in a delayed treatment until the infection becomes overt. In addition, the increased pH in patients with AD might promote the development of pathogenic strains of staph. However, ceramide-based moisturizers could help inhibit these strains by increasing skin acidity.
For patients who have poor AD control with standard therapy, antibiotics may be used as adjunctive therapy. “Consider bleach baths and/or staph decolonization with mupirocin, both of which led to significant improvement in eczema severity compared to placebo,” Dr. Kress said. “Bleach may also have an anti-inflammatory effect.”
Dr. Kress disclosed relationships with Pfizer, Amgen, and Sanofi/Regeneron. SDEF and this news organization are owned by Frontline Medical Communications.
EXPERT ANALYSIS FROM SDEF WOMEN’S & PEDIATRIC DERMATOLOGY SEMINAR