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Case Report
A 47-year-old man presented with a sudden-onset rash consisting of red bumps on the abdomen and legs that had been ongoing for several days. He had known psoriasis and psoriatic arthritis that had been well controlled with adalimumab for the last 18 months. He reported concurrent onset of nausea but denied fevers, chills, night sweats, unintentional weight loss, abdominal pain, and pruritus. He endorsed prior cutaneous infections of methicillin-resistant Staphylococcus aureus (MRSA). His medical history also included diabetes mellitus, hypertension, and obesity. His other medications included oral losartan-hydrochlorothiazide, amlodipine, naproxen, and atorvastatin.
Physical examination revealed numerous thin purpuric papules—some with adherent scale—distributed on the lower legs, extensor forearms, and abdomen. Abdominal lesions were confined to weight-related striae (Figure 1). The palms, soles, oral mucosa, and face were spared. Three punch biopsies were performed, including 1 for direct immunofluorescence (DIF), and the patient was instructed to apply clobetasol to the affected areas twice daily until further notice.
Pathology showed perivascular extravasation of erythrocytes, neutrophils, eosinophils, and leukocytoclasis surrounding blood vessels associated with fibrin (Figure 2). Direct immunofluorescence showed granular deposition of IgA, complement component 3, and fibrinogen in a superficial dermal vascular pattern (Figure 3). These results were consistent with IgA small-vessel vasculitis. One specimen was consistent with the patient’s known psoriasis.
Urinalysis revealed moderate hemoglobinuria, and urine microscopy showed 174 red blood cells per high-power field. Creatinine was high at 1.87 mg/dL (reference range, <1.34 mg/dL; patient’s baseline, 0.81 mg/dL) and glomerular filtration rate was low (42 mL/min, patient’s baseline, >60 mL/min [reference range, 90–120 mL/min]). Erythrocyte sedimentation rate (21 mm/h [reference range, 0–22 mm/h]) and C-reactive protein were elevated (2.2 mg/dL [reference range, 0.3–1.0 mg/dL]). Given his history of cutaneous MRSA infections, a bacterial culture swab was collected from the skin surface to check for colonization, which showed moderate growth of MRSA. Naproxen was discontinued over concern of worsening the patient’s renal status. The patient was instructed to rest at home with his legs elevated, wear compression socks when ambulatory, use chlorhexidine antiseptic daily as a body wash when showering, and apply mupirocin three times daily to the biopsy sites. He was referred to urology for his microhematuria, where cystoscopy revealed no abnormalities.A month passed with no improvement of the patient’s cutaneous vasculitis, and his psoriatic arthritis worsened without his usual use of naproxen. He developed abdominal pain and loss of appetite. A prednisone taper was ordered starting at 40 mg/d (28.8 mg/kg), which provided relief of the skin and joint symptoms only until the course was completed 12 days later.
Five weeks after the initial presentation, the patient returned with a more severe eruption consisting of innumerable purpuric papules that coalesced in plaques on the abdomen, arms, and legs. He also had erythematous facial pustules and mild palmar petechiae (Figure 4). Three biopsies were performed, including 1 for DIF and 1 from a pustule on the forehead. Histology and DIF were again consistent with IgA small-vessel vasculitis. The forehead biopsy was compatible with steroid acne (attributed to recent prednisone use) and psoriasis.
Rheumatology was consulted, and adalimumab was discontinued 6 weeks after the initial presentation out of concern for drug-induced cutaneous vasculitis. Vasculitis work-up was unremarkable, including antineutrophil cytoplasmic antibodies, rheumatoid factor, cyclic citrullinated peptide, and serum protein electrophoresis. Oral dapsone was started at 100 mg/d, with the tentative plan of starting secukinumab if cutaneous symptoms improved. For 3 weeks, the patient’s cutaneous symptoms steadily improved.
Nine weeks after initial presentation to dermatology (3 weeks after discontinuing adalimumab) the patient self-administered his first dose of secukinumab at home. Several hours later, he reported sudden reappearance of vasculitis. He denied diarrhea, abdominal pain, bowel movement urgency, fevers, fatigue, and unintentional weight loss. Antistreptolysin O and hepatitis A antibodies were negative. He was instructed to hold secukinumab indefinitely.
Four weeks after his only secukinumab injection, the patient reported another episode of acute worsening cutaneous symptoms. A 4-week prednisone taper starting at 40 mg/d was ordered. Computed tomography of the chest, abdomen, and pelvis to rule out internal malignancy was unremarkable. Around this time, the patient reported major emotional distress related to an unexpected death in his family, which added to a gradual increase in his stress level related to the COVID-19 pandemic.
Three weeks later, dapsone was increased to 100 mg twice daily on account of the patient’s adiposity and lack of cutaneous improvement on the lower dose. Subsequently, the vasculitis rapidly improved for 2 weeks. The patient then reported symptoms of headache, dizziness, and chills. He was tested for COVID-19 and was negative. Six weeks after increasing the dapsone dose (5 months after initial presentation), the skin was normalizing, showing only faintly hyperpigmented macules confined to areas of resolved vasculitis (forearms, abdomen, legs).
The patient had been on dapsone 100 mg twice daily for 3 months when he was started on ustekinumab (90 mg at weeks 0 and 4, with planned doses every 12 weeks) for psoriatic arthritis in hopes of withdrawing dapsone. His cutaneous symptoms have remained well controlled on this regimen for 18 months. Lowering of dapsone below 100 mg daily has resulted in recurrent mild vasculitis symptoms; he now maintains the once-daily dosing without negative side effects.
Comment
IgA vasculitis is a form of cutaneous small-vessel leukocytoclastic vasculitis (LCV) characterized by episodes of palpable purpura on the extensor surfaces of the arms and legs that may be associated with arthritis, abdominal pain, and/or hematuria. Although vasculitis is a known potential adverse effect of anti–tumor necrosis factor (TNF) α therapy, cases of adalimumab-induced IgA vasculitis are uncommon. As use of more targeted therapies for psoriasis and psoriatic arthritis, such as the IL-17 inhibitor secukinumab, increases so do reports of associated adverse events. Of 6 previously reported cases of secukinumab-associated vasculitis, at least 4 were IgA vasculitis (Table).1-6 Another case described one patient with rheumatoid arthritis undergoing secukinumab treatment who experienced necrotizing glomerulonephritis; however, the authors concluded secukinumab likely was not causative in that case, as serologies and urinalyses suggested gradual onset of the process prior to initiating the medication.7
The exact pathogenesis of IgA vasculitis is unclear, but a prevailing theory involves the dysregulation of IgA synthesis and metabolism. Other than increased serum levels of transforming growth factor β, which is a major stimulating factor for IgA production, it also has been hypothesized that the presence of aberrantly hypoglycosylated IgA exposes an autoepitope for recognition by other pathogenic IgG and IgA, leading to the formation of large immune complexes that can readily deposit in postcapillary venules. The deposition of IgA immune complexes in postcapillary venules and the subsequent activation of the complement system causes direct damage to the endothelial cells of vessel walls. This complement activation is evidenced by vascular complement component 3 deposition on DIF (a nonspecific feature of LCV). Chemotaxis of neutrophils ensues, followed by their firm adherence and transendothelial migration (mediated by monocyte chemoattractant protein 1 [MCP-1]). Neutrophil degranulation releases reactive oxygen species and cytokines, which in turn recruit additional leukocytes to the area of inflammation, subsequently undergoing degeneration (leukocytoclasis). Microvascular permeability also is enhanced by MCP-1, allowing exudation of serum, erythrocytes, and fibrin. In the setting of elevated circulating TNF and IL-1, endothelium is stimulated to activate the intrinsic and extrinsic coagulation pathways. This decreases endothelial fibrinolytic activity, leading to thrombosis. The high venous pressure and low fibrinolytic activity in the lower legs explains why vasculitic lesions often are confined to or begin in this distribution.1,8-10
There also are noteworthy roles for cytokines in LCV. Circulating transforming growth factor β and IL-6—which are necessary for development of T helper 17 (TH17) cells and production of IL-17—are higher in patients with LCV compared to controls. Peripheral blood monocytes in patients with LCV demonstrate higher production of IL-17. Once TH17 cells develop, their survival and phenotype are maintained by IL-23 (considered the master regulator of TH17 differentiation). IL-17 is a potent chemoattractant of IL-8 (CXCL8) and MCP-1, both of which promote neutrophil-mediated perivascular inflammation. The IL-23 and IL-17 pathways implicated in the pathogenesis of psoriasis also cause neutrophil activation and upregulate transcription of proinflammatory cytokines (IL-1, IL-6, IL-8, and TNF-α), which overlap with those implicated in LCV. Autoimmune disease generally entails some positive feedback loop of progressively severe self-recognition and tissue destruction by the immune system. These shared cytokinetic processes may explain how the internal environment of psoriasis could perpetuate IgA vasculitis.1,2,8,10-12
The mechanisms underlying vasculitis associated with adalimumab are unclear, but hypotheses involve direct toxicity on vessels, capillary deposition of anti-TNF/TNF immune complexes, or an inflammatory process resulting in autoantibodies. Similar hypotheses are posited for secukinumab-associated vasculitis, including deposition of secukinumab–IL-17 complexes. Anti–TNF-α medications may increase TH17 cell numbers, leading to increased production of IL-22 and a resultant immunologic microenvironment conducive to vasculitis. All 6 published cases of secukinumab-associated vasculitis that we found had received prior treatment with a TNF-α blocker, but only 1 had occurrence of vasculitis during that treatment.1-6,10
In the 6 cases we reviewed, the time from starting secukinumab to onset of vasculitis ranged from 1 to 18 months. Our patient’s same-day re-emergence of vasculitis after his first secukinumab dose was so acute that we were skeptical of secukinumab as a potential trigger; this may simply have been coincident to the natural waxing and waning of the vasculitis (although onset of IgA vasculitis within 1 day of starting anti–TNF-α therapy has been reported).1-6,13
Specific associations of IgA vasculitis are many and can include bacterial organisms such as Helicobacter pylori, streptococci, and staphylococci. Although internal mucous membrane infections are considered more linked because of the surveillance role of IgA predominantly in mucosal tissues, it is possible that our patient with cutaneous MRSA harbored the same within the nasal mucosa. Our patient also received multiple vaccinations outside our department throughout his clinical course (2 hepatitis B and 1 pneumococcal conjugate), which are known potential triggers for vasculitis. Psychological stress is a known trigger for psoriasis, and given the cytokinetic relationship of psoriasis to vasculitis described previously, it may have indirectly contributed to vasculitis in our case. The anxiety associated with being immunosuppressed during the COVID-19 pandemic and bereavement of losing a family member may have contributed to the refractory nature of our patient’s condition. Renal involvement is relatively common in adults with IgA vasculitis and so should be ruled out, as should occult internal malignancy.8,10,14
It is unclear which of the above factors was causative in our case, but a multifactorial process is likely. Treatment of monoclonal antibody–associated vasculitis entails investigating for triggers and systemic involvement, removing the most likely culprit, quelling the vasculitis acutely, avoiding known potential exacerbators, and introducing an alternative long-term immunomodulant. In all 6 reported similar cases, discontinuation of secukinumab and initiation of prednisone or colchicine led to resolution.1-6 Dapsone also is acceptable for acute control of IgA vasculitis, although this medication is highly lipid soluble and penetrates well into various tissues.15 Thus, lower doses may prove ineffective for obese patients, as was demonstrated in our case. Given the known potential of vaccinations, infections, and other factors (eg, alcohol, penicillin) to trigger IgA vasculitis, these should be avoided.10
Blockade of IL-23 with ustekinumab has been suggested by other authors encountering secukinumab-associated vasculitis, as IL-23 is the main driver and sustainer of TH17 cell differentiation.8 Although 6 previously reported cases of secukinumab-associated vasculitis achieved resolution without long-term recurrence, none did so using an IL-23 inhibitor (nor had any of the described patients received IL-23 inhibitors previously).1-6 Given the established safety of IL-23 inhibitors and that they theoretically are well suited for this unique circumstance (by ceasing the main causative cytokine cascades “upstream”) and were efficacious in quickly resolving our patient’s vasculitis, we suggest that ustekinumab may represent
- Reverte M, Etienne M, Fouchard M, et al. Occurrence of Henoch-Schönlein purpura in a patient treated with secukinumab. J Eur Acad Dermatol Venereol. 2019;33:E455-E457.
- Chelli C, Loget J, Vanhaecke C, et al. Cutaneous vasculitis with gut involvement during secukinumab treatment for psoriatic arthritis. Acta Derm Venereol. 2020;100:adv00077.
- da Silva Cendon Duran C, Santiago MB. Cutaneous vasculitis during secukinumab treatment. Eur J Case Rep Intern Med. 2020;7:001815.
- Bostan E, Gulseren D, Yalici-Armagan B, et al. Vasculitis during certolizumab pegol and secukinumab treatment: report of two cases. Dermatol Ther. 2021;34:E15007.
- Perkovic D, Simac P, Katic J. IgA vasculitis during secukinumab therapy. Clin Rheumatol. 2021;40:2071-2073.
- Villani A, DE Fata Salvatores G, Nappa P, et al. Cutaneous leucocytoclastic vasculitis during secukinumab treatment. Ital J Dermatol Venerol. 2021;156(suppl 1 to no. 6):9-10.
- Góis M, Messias A, Carvalho D, et al. MPO-ANCA-associated necrotizing glomerulonephritis in rheumatoid arthritis; a case report and review of literature. J Nephropathol. 2017;6:58-62.
- Jen HY, Chuang YH, Lin SC, et al. Increased serum interleukin-17 and peripheral Th17 cells in children with acute Henoch-Schönlein purpura. Pediatr Allergy Immunol. 2011;22:862-868.
- Hetland LE, Susrud KS, Lindahl KH, et al. Henoch-Schönlein purpura: a literature review. Acta Derm Venereol 2017;97:1160-1166.
- Weedon D. The vasculopathic reaction pattern. In: Houston M, Davie B, eds. Weedon’s Skin Pathology. 3rd ed. Elsevier Limited; 2010:207-211.
- Puig L. Paradoxical reactions: anti-TNFα ants, ustekinumab, secukinumab, ixekizumab, and others. Curr Probl Dermatol. 2018;53:49-63.
- Nestle F, Kaplan D, Barker J. Psoriasis. N Engl J Med. 2009;361:496-509.
- Pinheiro RR, Lencastre A. Henoch-Schönlein purpura during anti-TNFα therapy: a fortuitous event or an indication to stop therapy? Eur J Dermatol. 2017;27:304-305.
- Hello CL, Cohen P, Bousser MG, et al. Suspected hepatitis B vaccination related vasculitis. J Rheumatol. 1999;26:191-194.
- Wolverton SE. Dapsone. In: Wolverton SE, Wu JJ, eds. Comprehensive Dermatologic Drug Therapy. 4th ed. Elsevier, Inc; 2021:222-231.
Case Report
A 47-year-old man presented with a sudden-onset rash consisting of red bumps on the abdomen and legs that had been ongoing for several days. He had known psoriasis and psoriatic arthritis that had been well controlled with adalimumab for the last 18 months. He reported concurrent onset of nausea but denied fevers, chills, night sweats, unintentional weight loss, abdominal pain, and pruritus. He endorsed prior cutaneous infections of methicillin-resistant Staphylococcus aureus (MRSA). His medical history also included diabetes mellitus, hypertension, and obesity. His other medications included oral losartan-hydrochlorothiazide, amlodipine, naproxen, and atorvastatin.
Physical examination revealed numerous thin purpuric papules—some with adherent scale—distributed on the lower legs, extensor forearms, and abdomen. Abdominal lesions were confined to weight-related striae (Figure 1). The palms, soles, oral mucosa, and face were spared. Three punch biopsies were performed, including 1 for direct immunofluorescence (DIF), and the patient was instructed to apply clobetasol to the affected areas twice daily until further notice.
Pathology showed perivascular extravasation of erythrocytes, neutrophils, eosinophils, and leukocytoclasis surrounding blood vessels associated with fibrin (Figure 2). Direct immunofluorescence showed granular deposition of IgA, complement component 3, and fibrinogen in a superficial dermal vascular pattern (Figure 3). These results were consistent with IgA small-vessel vasculitis. One specimen was consistent with the patient’s known psoriasis.
Urinalysis revealed moderate hemoglobinuria, and urine microscopy showed 174 red blood cells per high-power field. Creatinine was high at 1.87 mg/dL (reference range, <1.34 mg/dL; patient’s baseline, 0.81 mg/dL) and glomerular filtration rate was low (42 mL/min, patient’s baseline, >60 mL/min [reference range, 90–120 mL/min]). Erythrocyte sedimentation rate (21 mm/h [reference range, 0–22 mm/h]) and C-reactive protein were elevated (2.2 mg/dL [reference range, 0.3–1.0 mg/dL]). Given his history of cutaneous MRSA infections, a bacterial culture swab was collected from the skin surface to check for colonization, which showed moderate growth of MRSA. Naproxen was discontinued over concern of worsening the patient’s renal status. The patient was instructed to rest at home with his legs elevated, wear compression socks when ambulatory, use chlorhexidine antiseptic daily as a body wash when showering, and apply mupirocin three times daily to the biopsy sites. He was referred to urology for his microhematuria, where cystoscopy revealed no abnormalities.A month passed with no improvement of the patient’s cutaneous vasculitis, and his psoriatic arthritis worsened without his usual use of naproxen. He developed abdominal pain and loss of appetite. A prednisone taper was ordered starting at 40 mg/d (28.8 mg/kg), which provided relief of the skin and joint symptoms only until the course was completed 12 days later.
Five weeks after the initial presentation, the patient returned with a more severe eruption consisting of innumerable purpuric papules that coalesced in plaques on the abdomen, arms, and legs. He also had erythematous facial pustules and mild palmar petechiae (Figure 4). Three biopsies were performed, including 1 for DIF and 1 from a pustule on the forehead. Histology and DIF were again consistent with IgA small-vessel vasculitis. The forehead biopsy was compatible with steroid acne (attributed to recent prednisone use) and psoriasis.
Rheumatology was consulted, and adalimumab was discontinued 6 weeks after the initial presentation out of concern for drug-induced cutaneous vasculitis. Vasculitis work-up was unremarkable, including antineutrophil cytoplasmic antibodies, rheumatoid factor, cyclic citrullinated peptide, and serum protein electrophoresis. Oral dapsone was started at 100 mg/d, with the tentative plan of starting secukinumab if cutaneous symptoms improved. For 3 weeks, the patient’s cutaneous symptoms steadily improved.
Nine weeks after initial presentation to dermatology (3 weeks after discontinuing adalimumab) the patient self-administered his first dose of secukinumab at home. Several hours later, he reported sudden reappearance of vasculitis. He denied diarrhea, abdominal pain, bowel movement urgency, fevers, fatigue, and unintentional weight loss. Antistreptolysin O and hepatitis A antibodies were negative. He was instructed to hold secukinumab indefinitely.
Four weeks after his only secukinumab injection, the patient reported another episode of acute worsening cutaneous symptoms. A 4-week prednisone taper starting at 40 mg/d was ordered. Computed tomography of the chest, abdomen, and pelvis to rule out internal malignancy was unremarkable. Around this time, the patient reported major emotional distress related to an unexpected death in his family, which added to a gradual increase in his stress level related to the COVID-19 pandemic.
Three weeks later, dapsone was increased to 100 mg twice daily on account of the patient’s adiposity and lack of cutaneous improvement on the lower dose. Subsequently, the vasculitis rapidly improved for 2 weeks. The patient then reported symptoms of headache, dizziness, and chills. He was tested for COVID-19 and was negative. Six weeks after increasing the dapsone dose (5 months after initial presentation), the skin was normalizing, showing only faintly hyperpigmented macules confined to areas of resolved vasculitis (forearms, abdomen, legs).
The patient had been on dapsone 100 mg twice daily for 3 months when he was started on ustekinumab (90 mg at weeks 0 and 4, with planned doses every 12 weeks) for psoriatic arthritis in hopes of withdrawing dapsone. His cutaneous symptoms have remained well controlled on this regimen for 18 months. Lowering of dapsone below 100 mg daily has resulted in recurrent mild vasculitis symptoms; he now maintains the once-daily dosing without negative side effects.
Comment
IgA vasculitis is a form of cutaneous small-vessel leukocytoclastic vasculitis (LCV) characterized by episodes of palpable purpura on the extensor surfaces of the arms and legs that may be associated with arthritis, abdominal pain, and/or hematuria. Although vasculitis is a known potential adverse effect of anti–tumor necrosis factor (TNF) α therapy, cases of adalimumab-induced IgA vasculitis are uncommon. As use of more targeted therapies for psoriasis and psoriatic arthritis, such as the IL-17 inhibitor secukinumab, increases so do reports of associated adverse events. Of 6 previously reported cases of secukinumab-associated vasculitis, at least 4 were IgA vasculitis (Table).1-6 Another case described one patient with rheumatoid arthritis undergoing secukinumab treatment who experienced necrotizing glomerulonephritis; however, the authors concluded secukinumab likely was not causative in that case, as serologies and urinalyses suggested gradual onset of the process prior to initiating the medication.7
The exact pathogenesis of IgA vasculitis is unclear, but a prevailing theory involves the dysregulation of IgA synthesis and metabolism. Other than increased serum levels of transforming growth factor β, which is a major stimulating factor for IgA production, it also has been hypothesized that the presence of aberrantly hypoglycosylated IgA exposes an autoepitope for recognition by other pathogenic IgG and IgA, leading to the formation of large immune complexes that can readily deposit in postcapillary venules. The deposition of IgA immune complexes in postcapillary venules and the subsequent activation of the complement system causes direct damage to the endothelial cells of vessel walls. This complement activation is evidenced by vascular complement component 3 deposition on DIF (a nonspecific feature of LCV). Chemotaxis of neutrophils ensues, followed by their firm adherence and transendothelial migration (mediated by monocyte chemoattractant protein 1 [MCP-1]). Neutrophil degranulation releases reactive oxygen species and cytokines, which in turn recruit additional leukocytes to the area of inflammation, subsequently undergoing degeneration (leukocytoclasis). Microvascular permeability also is enhanced by MCP-1, allowing exudation of serum, erythrocytes, and fibrin. In the setting of elevated circulating TNF and IL-1, endothelium is stimulated to activate the intrinsic and extrinsic coagulation pathways. This decreases endothelial fibrinolytic activity, leading to thrombosis. The high venous pressure and low fibrinolytic activity in the lower legs explains why vasculitic lesions often are confined to or begin in this distribution.1,8-10
There also are noteworthy roles for cytokines in LCV. Circulating transforming growth factor β and IL-6—which are necessary for development of T helper 17 (TH17) cells and production of IL-17—are higher in patients with LCV compared to controls. Peripheral blood monocytes in patients with LCV demonstrate higher production of IL-17. Once TH17 cells develop, their survival and phenotype are maintained by IL-23 (considered the master regulator of TH17 differentiation). IL-17 is a potent chemoattractant of IL-8 (CXCL8) and MCP-1, both of which promote neutrophil-mediated perivascular inflammation. The IL-23 and IL-17 pathways implicated in the pathogenesis of psoriasis also cause neutrophil activation and upregulate transcription of proinflammatory cytokines (IL-1, IL-6, IL-8, and TNF-α), which overlap with those implicated in LCV. Autoimmune disease generally entails some positive feedback loop of progressively severe self-recognition and tissue destruction by the immune system. These shared cytokinetic processes may explain how the internal environment of psoriasis could perpetuate IgA vasculitis.1,2,8,10-12
The mechanisms underlying vasculitis associated with adalimumab are unclear, but hypotheses involve direct toxicity on vessels, capillary deposition of anti-TNF/TNF immune complexes, or an inflammatory process resulting in autoantibodies. Similar hypotheses are posited for secukinumab-associated vasculitis, including deposition of secukinumab–IL-17 complexes. Anti–TNF-α medications may increase TH17 cell numbers, leading to increased production of IL-22 and a resultant immunologic microenvironment conducive to vasculitis. All 6 published cases of secukinumab-associated vasculitis that we found had received prior treatment with a TNF-α blocker, but only 1 had occurrence of vasculitis during that treatment.1-6,10
In the 6 cases we reviewed, the time from starting secukinumab to onset of vasculitis ranged from 1 to 18 months. Our patient’s same-day re-emergence of vasculitis after his first secukinumab dose was so acute that we were skeptical of secukinumab as a potential trigger; this may simply have been coincident to the natural waxing and waning of the vasculitis (although onset of IgA vasculitis within 1 day of starting anti–TNF-α therapy has been reported).1-6,13
Specific associations of IgA vasculitis are many and can include bacterial organisms such as Helicobacter pylori, streptococci, and staphylococci. Although internal mucous membrane infections are considered more linked because of the surveillance role of IgA predominantly in mucosal tissues, it is possible that our patient with cutaneous MRSA harbored the same within the nasal mucosa. Our patient also received multiple vaccinations outside our department throughout his clinical course (2 hepatitis B and 1 pneumococcal conjugate), which are known potential triggers for vasculitis. Psychological stress is a known trigger for psoriasis, and given the cytokinetic relationship of psoriasis to vasculitis described previously, it may have indirectly contributed to vasculitis in our case. The anxiety associated with being immunosuppressed during the COVID-19 pandemic and bereavement of losing a family member may have contributed to the refractory nature of our patient’s condition. Renal involvement is relatively common in adults with IgA vasculitis and so should be ruled out, as should occult internal malignancy.8,10,14
It is unclear which of the above factors was causative in our case, but a multifactorial process is likely. Treatment of monoclonal antibody–associated vasculitis entails investigating for triggers and systemic involvement, removing the most likely culprit, quelling the vasculitis acutely, avoiding known potential exacerbators, and introducing an alternative long-term immunomodulant. In all 6 reported similar cases, discontinuation of secukinumab and initiation of prednisone or colchicine led to resolution.1-6 Dapsone also is acceptable for acute control of IgA vasculitis, although this medication is highly lipid soluble and penetrates well into various tissues.15 Thus, lower doses may prove ineffective for obese patients, as was demonstrated in our case. Given the known potential of vaccinations, infections, and other factors (eg, alcohol, penicillin) to trigger IgA vasculitis, these should be avoided.10
Blockade of IL-23 with ustekinumab has been suggested by other authors encountering secukinumab-associated vasculitis, as IL-23 is the main driver and sustainer of TH17 cell differentiation.8 Although 6 previously reported cases of secukinumab-associated vasculitis achieved resolution without long-term recurrence, none did so using an IL-23 inhibitor (nor had any of the described patients received IL-23 inhibitors previously).1-6 Given the established safety of IL-23 inhibitors and that they theoretically are well suited for this unique circumstance (by ceasing the main causative cytokine cascades “upstream”) and were efficacious in quickly resolving our patient’s vasculitis, we suggest that ustekinumab may represent
Case Report
A 47-year-old man presented with a sudden-onset rash consisting of red bumps on the abdomen and legs that had been ongoing for several days. He had known psoriasis and psoriatic arthritis that had been well controlled with adalimumab for the last 18 months. He reported concurrent onset of nausea but denied fevers, chills, night sweats, unintentional weight loss, abdominal pain, and pruritus. He endorsed prior cutaneous infections of methicillin-resistant Staphylococcus aureus (MRSA). His medical history also included diabetes mellitus, hypertension, and obesity. His other medications included oral losartan-hydrochlorothiazide, amlodipine, naproxen, and atorvastatin.
Physical examination revealed numerous thin purpuric papules—some with adherent scale—distributed on the lower legs, extensor forearms, and abdomen. Abdominal lesions were confined to weight-related striae (Figure 1). The palms, soles, oral mucosa, and face were spared. Three punch biopsies were performed, including 1 for direct immunofluorescence (DIF), and the patient was instructed to apply clobetasol to the affected areas twice daily until further notice.
Pathology showed perivascular extravasation of erythrocytes, neutrophils, eosinophils, and leukocytoclasis surrounding blood vessels associated with fibrin (Figure 2). Direct immunofluorescence showed granular deposition of IgA, complement component 3, and fibrinogen in a superficial dermal vascular pattern (Figure 3). These results were consistent with IgA small-vessel vasculitis. One specimen was consistent with the patient’s known psoriasis.
Urinalysis revealed moderate hemoglobinuria, and urine microscopy showed 174 red blood cells per high-power field. Creatinine was high at 1.87 mg/dL (reference range, <1.34 mg/dL; patient’s baseline, 0.81 mg/dL) and glomerular filtration rate was low (42 mL/min, patient’s baseline, >60 mL/min [reference range, 90–120 mL/min]). Erythrocyte sedimentation rate (21 mm/h [reference range, 0–22 mm/h]) and C-reactive protein were elevated (2.2 mg/dL [reference range, 0.3–1.0 mg/dL]). Given his history of cutaneous MRSA infections, a bacterial culture swab was collected from the skin surface to check for colonization, which showed moderate growth of MRSA. Naproxen was discontinued over concern of worsening the patient’s renal status. The patient was instructed to rest at home with his legs elevated, wear compression socks when ambulatory, use chlorhexidine antiseptic daily as a body wash when showering, and apply mupirocin three times daily to the biopsy sites. He was referred to urology for his microhematuria, where cystoscopy revealed no abnormalities.A month passed with no improvement of the patient’s cutaneous vasculitis, and his psoriatic arthritis worsened without his usual use of naproxen. He developed abdominal pain and loss of appetite. A prednisone taper was ordered starting at 40 mg/d (28.8 mg/kg), which provided relief of the skin and joint symptoms only until the course was completed 12 days later.
Five weeks after the initial presentation, the patient returned with a more severe eruption consisting of innumerable purpuric papules that coalesced in plaques on the abdomen, arms, and legs. He also had erythematous facial pustules and mild palmar petechiae (Figure 4). Three biopsies were performed, including 1 for DIF and 1 from a pustule on the forehead. Histology and DIF were again consistent with IgA small-vessel vasculitis. The forehead biopsy was compatible with steroid acne (attributed to recent prednisone use) and psoriasis.
Rheumatology was consulted, and adalimumab was discontinued 6 weeks after the initial presentation out of concern for drug-induced cutaneous vasculitis. Vasculitis work-up was unremarkable, including antineutrophil cytoplasmic antibodies, rheumatoid factor, cyclic citrullinated peptide, and serum protein electrophoresis. Oral dapsone was started at 100 mg/d, with the tentative plan of starting secukinumab if cutaneous symptoms improved. For 3 weeks, the patient’s cutaneous symptoms steadily improved.
Nine weeks after initial presentation to dermatology (3 weeks after discontinuing adalimumab) the patient self-administered his first dose of secukinumab at home. Several hours later, he reported sudden reappearance of vasculitis. He denied diarrhea, abdominal pain, bowel movement urgency, fevers, fatigue, and unintentional weight loss. Antistreptolysin O and hepatitis A antibodies were negative. He was instructed to hold secukinumab indefinitely.
Four weeks after his only secukinumab injection, the patient reported another episode of acute worsening cutaneous symptoms. A 4-week prednisone taper starting at 40 mg/d was ordered. Computed tomography of the chest, abdomen, and pelvis to rule out internal malignancy was unremarkable. Around this time, the patient reported major emotional distress related to an unexpected death in his family, which added to a gradual increase in his stress level related to the COVID-19 pandemic.
Three weeks later, dapsone was increased to 100 mg twice daily on account of the patient’s adiposity and lack of cutaneous improvement on the lower dose. Subsequently, the vasculitis rapidly improved for 2 weeks. The patient then reported symptoms of headache, dizziness, and chills. He was tested for COVID-19 and was negative. Six weeks after increasing the dapsone dose (5 months after initial presentation), the skin was normalizing, showing only faintly hyperpigmented macules confined to areas of resolved vasculitis (forearms, abdomen, legs).
The patient had been on dapsone 100 mg twice daily for 3 months when he was started on ustekinumab (90 mg at weeks 0 and 4, with planned doses every 12 weeks) for psoriatic arthritis in hopes of withdrawing dapsone. His cutaneous symptoms have remained well controlled on this regimen for 18 months. Lowering of dapsone below 100 mg daily has resulted in recurrent mild vasculitis symptoms; he now maintains the once-daily dosing without negative side effects.
Comment
IgA vasculitis is a form of cutaneous small-vessel leukocytoclastic vasculitis (LCV) characterized by episodes of palpable purpura on the extensor surfaces of the arms and legs that may be associated with arthritis, abdominal pain, and/or hematuria. Although vasculitis is a known potential adverse effect of anti–tumor necrosis factor (TNF) α therapy, cases of adalimumab-induced IgA vasculitis are uncommon. As use of more targeted therapies for psoriasis and psoriatic arthritis, such as the IL-17 inhibitor secukinumab, increases so do reports of associated adverse events. Of 6 previously reported cases of secukinumab-associated vasculitis, at least 4 were IgA vasculitis (Table).1-6 Another case described one patient with rheumatoid arthritis undergoing secukinumab treatment who experienced necrotizing glomerulonephritis; however, the authors concluded secukinumab likely was not causative in that case, as serologies and urinalyses suggested gradual onset of the process prior to initiating the medication.7
The exact pathogenesis of IgA vasculitis is unclear, but a prevailing theory involves the dysregulation of IgA synthesis and metabolism. Other than increased serum levels of transforming growth factor β, which is a major stimulating factor for IgA production, it also has been hypothesized that the presence of aberrantly hypoglycosylated IgA exposes an autoepitope for recognition by other pathogenic IgG and IgA, leading to the formation of large immune complexes that can readily deposit in postcapillary venules. The deposition of IgA immune complexes in postcapillary venules and the subsequent activation of the complement system causes direct damage to the endothelial cells of vessel walls. This complement activation is evidenced by vascular complement component 3 deposition on DIF (a nonspecific feature of LCV). Chemotaxis of neutrophils ensues, followed by their firm adherence and transendothelial migration (mediated by monocyte chemoattractant protein 1 [MCP-1]). Neutrophil degranulation releases reactive oxygen species and cytokines, which in turn recruit additional leukocytes to the area of inflammation, subsequently undergoing degeneration (leukocytoclasis). Microvascular permeability also is enhanced by MCP-1, allowing exudation of serum, erythrocytes, and fibrin. In the setting of elevated circulating TNF and IL-1, endothelium is stimulated to activate the intrinsic and extrinsic coagulation pathways. This decreases endothelial fibrinolytic activity, leading to thrombosis. The high venous pressure and low fibrinolytic activity in the lower legs explains why vasculitic lesions often are confined to or begin in this distribution.1,8-10
There also are noteworthy roles for cytokines in LCV. Circulating transforming growth factor β and IL-6—which are necessary for development of T helper 17 (TH17) cells and production of IL-17—are higher in patients with LCV compared to controls. Peripheral blood monocytes in patients with LCV demonstrate higher production of IL-17. Once TH17 cells develop, their survival and phenotype are maintained by IL-23 (considered the master regulator of TH17 differentiation). IL-17 is a potent chemoattractant of IL-8 (CXCL8) and MCP-1, both of which promote neutrophil-mediated perivascular inflammation. The IL-23 and IL-17 pathways implicated in the pathogenesis of psoriasis also cause neutrophil activation and upregulate transcription of proinflammatory cytokines (IL-1, IL-6, IL-8, and TNF-α), which overlap with those implicated in LCV. Autoimmune disease generally entails some positive feedback loop of progressively severe self-recognition and tissue destruction by the immune system. These shared cytokinetic processes may explain how the internal environment of psoriasis could perpetuate IgA vasculitis.1,2,8,10-12
The mechanisms underlying vasculitis associated with adalimumab are unclear, but hypotheses involve direct toxicity on vessels, capillary deposition of anti-TNF/TNF immune complexes, or an inflammatory process resulting in autoantibodies. Similar hypotheses are posited for secukinumab-associated vasculitis, including deposition of secukinumab–IL-17 complexes. Anti–TNF-α medications may increase TH17 cell numbers, leading to increased production of IL-22 and a resultant immunologic microenvironment conducive to vasculitis. All 6 published cases of secukinumab-associated vasculitis that we found had received prior treatment with a TNF-α blocker, but only 1 had occurrence of vasculitis during that treatment.1-6,10
In the 6 cases we reviewed, the time from starting secukinumab to onset of vasculitis ranged from 1 to 18 months. Our patient’s same-day re-emergence of vasculitis after his first secukinumab dose was so acute that we were skeptical of secukinumab as a potential trigger; this may simply have been coincident to the natural waxing and waning of the vasculitis (although onset of IgA vasculitis within 1 day of starting anti–TNF-α therapy has been reported).1-6,13
Specific associations of IgA vasculitis are many and can include bacterial organisms such as Helicobacter pylori, streptococci, and staphylococci. Although internal mucous membrane infections are considered more linked because of the surveillance role of IgA predominantly in mucosal tissues, it is possible that our patient with cutaneous MRSA harbored the same within the nasal mucosa. Our patient also received multiple vaccinations outside our department throughout his clinical course (2 hepatitis B and 1 pneumococcal conjugate), which are known potential triggers for vasculitis. Psychological stress is a known trigger for psoriasis, and given the cytokinetic relationship of psoriasis to vasculitis described previously, it may have indirectly contributed to vasculitis in our case. The anxiety associated with being immunosuppressed during the COVID-19 pandemic and bereavement of losing a family member may have contributed to the refractory nature of our patient’s condition. Renal involvement is relatively common in adults with IgA vasculitis and so should be ruled out, as should occult internal malignancy.8,10,14
It is unclear which of the above factors was causative in our case, but a multifactorial process is likely. Treatment of monoclonal antibody–associated vasculitis entails investigating for triggers and systemic involvement, removing the most likely culprit, quelling the vasculitis acutely, avoiding known potential exacerbators, and introducing an alternative long-term immunomodulant. In all 6 reported similar cases, discontinuation of secukinumab and initiation of prednisone or colchicine led to resolution.1-6 Dapsone also is acceptable for acute control of IgA vasculitis, although this medication is highly lipid soluble and penetrates well into various tissues.15 Thus, lower doses may prove ineffective for obese patients, as was demonstrated in our case. Given the known potential of vaccinations, infections, and other factors (eg, alcohol, penicillin) to trigger IgA vasculitis, these should be avoided.10
Blockade of IL-23 with ustekinumab has been suggested by other authors encountering secukinumab-associated vasculitis, as IL-23 is the main driver and sustainer of TH17 cell differentiation.8 Although 6 previously reported cases of secukinumab-associated vasculitis achieved resolution without long-term recurrence, none did so using an IL-23 inhibitor (nor had any of the described patients received IL-23 inhibitors previously).1-6 Given the established safety of IL-23 inhibitors and that they theoretically are well suited for this unique circumstance (by ceasing the main causative cytokine cascades “upstream”) and were efficacious in quickly resolving our patient’s vasculitis, we suggest that ustekinumab may represent
- Reverte M, Etienne M, Fouchard M, et al. Occurrence of Henoch-Schönlein purpura in a patient treated with secukinumab. J Eur Acad Dermatol Venereol. 2019;33:E455-E457.
- Chelli C, Loget J, Vanhaecke C, et al. Cutaneous vasculitis with gut involvement during secukinumab treatment for psoriatic arthritis. Acta Derm Venereol. 2020;100:adv00077.
- da Silva Cendon Duran C, Santiago MB. Cutaneous vasculitis during secukinumab treatment. Eur J Case Rep Intern Med. 2020;7:001815.
- Bostan E, Gulseren D, Yalici-Armagan B, et al. Vasculitis during certolizumab pegol and secukinumab treatment: report of two cases. Dermatol Ther. 2021;34:E15007.
- Perkovic D, Simac P, Katic J. IgA vasculitis during secukinumab therapy. Clin Rheumatol. 2021;40:2071-2073.
- Villani A, DE Fata Salvatores G, Nappa P, et al. Cutaneous leucocytoclastic vasculitis during secukinumab treatment. Ital J Dermatol Venerol. 2021;156(suppl 1 to no. 6):9-10.
- Góis M, Messias A, Carvalho D, et al. MPO-ANCA-associated necrotizing glomerulonephritis in rheumatoid arthritis; a case report and review of literature. J Nephropathol. 2017;6:58-62.
- Jen HY, Chuang YH, Lin SC, et al. Increased serum interleukin-17 and peripheral Th17 cells in children with acute Henoch-Schönlein purpura. Pediatr Allergy Immunol. 2011;22:862-868.
- Hetland LE, Susrud KS, Lindahl KH, et al. Henoch-Schönlein purpura: a literature review. Acta Derm Venereol 2017;97:1160-1166.
- Weedon D. The vasculopathic reaction pattern. In: Houston M, Davie B, eds. Weedon’s Skin Pathology. 3rd ed. Elsevier Limited; 2010:207-211.
- Puig L. Paradoxical reactions: anti-TNFα ants, ustekinumab, secukinumab, ixekizumab, and others. Curr Probl Dermatol. 2018;53:49-63.
- Nestle F, Kaplan D, Barker J. Psoriasis. N Engl J Med. 2009;361:496-509.
- Pinheiro RR, Lencastre A. Henoch-Schönlein purpura during anti-TNFα therapy: a fortuitous event or an indication to stop therapy? Eur J Dermatol. 2017;27:304-305.
- Hello CL, Cohen P, Bousser MG, et al. Suspected hepatitis B vaccination related vasculitis. J Rheumatol. 1999;26:191-194.
- Wolverton SE. Dapsone. In: Wolverton SE, Wu JJ, eds. Comprehensive Dermatologic Drug Therapy. 4th ed. Elsevier, Inc; 2021:222-231.
- Reverte M, Etienne M, Fouchard M, et al. Occurrence of Henoch-Schönlein purpura in a patient treated with secukinumab. J Eur Acad Dermatol Venereol. 2019;33:E455-E457.
- Chelli C, Loget J, Vanhaecke C, et al. Cutaneous vasculitis with gut involvement during secukinumab treatment for psoriatic arthritis. Acta Derm Venereol. 2020;100:adv00077.
- da Silva Cendon Duran C, Santiago MB. Cutaneous vasculitis during secukinumab treatment. Eur J Case Rep Intern Med. 2020;7:001815.
- Bostan E, Gulseren D, Yalici-Armagan B, et al. Vasculitis during certolizumab pegol and secukinumab treatment: report of two cases. Dermatol Ther. 2021;34:E15007.
- Perkovic D, Simac P, Katic J. IgA vasculitis during secukinumab therapy. Clin Rheumatol. 2021;40:2071-2073.
- Villani A, DE Fata Salvatores G, Nappa P, et al. Cutaneous leucocytoclastic vasculitis during secukinumab treatment. Ital J Dermatol Venerol. 2021;156(suppl 1 to no. 6):9-10.
- Góis M, Messias A, Carvalho D, et al. MPO-ANCA-associated necrotizing glomerulonephritis in rheumatoid arthritis; a case report and review of literature. J Nephropathol. 2017;6:58-62.
- Jen HY, Chuang YH, Lin SC, et al. Increased serum interleukin-17 and peripheral Th17 cells in children with acute Henoch-Schönlein purpura. Pediatr Allergy Immunol. 2011;22:862-868.
- Hetland LE, Susrud KS, Lindahl KH, et al. Henoch-Schönlein purpura: a literature review. Acta Derm Venereol 2017;97:1160-1166.
- Weedon D. The vasculopathic reaction pattern. In: Houston M, Davie B, eds. Weedon’s Skin Pathology. 3rd ed. Elsevier Limited; 2010:207-211.
- Puig L. Paradoxical reactions: anti-TNFα ants, ustekinumab, secukinumab, ixekizumab, and others. Curr Probl Dermatol. 2018;53:49-63.
- Nestle F, Kaplan D, Barker J. Psoriasis. N Engl J Med. 2009;361:496-509.
- Pinheiro RR, Lencastre A. Henoch-Schönlein purpura during anti-TNFα therapy: a fortuitous event or an indication to stop therapy? Eur J Dermatol. 2017;27:304-305.
- Hello CL, Cohen P, Bousser MG, et al. Suspected hepatitis B vaccination related vasculitis. J Rheumatol. 1999;26:191-194.
- Wolverton SE. Dapsone. In: Wolverton SE, Wu JJ, eds. Comprehensive Dermatologic Drug Therapy. 4th ed. Elsevier, Inc; 2021:222-231.
Practice Points
- Biologic medications including adalimumab and more rarely secukinumab may be associated with leukocytoclastic vasculitis; a smaller subset of patients may experience IgA vasculitis.
- The IL-23 blocker ustekinumab may represent an ideal therapeutic agent when secukinumabassociated vasculitis is suspected. Because IL-23 is the main driver and sustainer of TH17 cell differentiation, it may cease the main causative cytokine cascades “upstream.”
