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Pemphigoid nodularis: a case report.

Julia S Lehman¹, Amer N Kalaaji, Roy S Rogers

¹Department of Dermatology, Mayo Clinic, 200 First St SW, Rochester, MN 55905, USA.

|January 26, 2012

Summary

This summary is machine-generated.

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Pemphigoid nodularis combines prurigo nodularis with bullous pemphigoid features. Diagnosis requires both indirect immunofluorescence (IIF) and direct immunofluorescence (DIF) testing for accuracy.

Area of Science:

Dermatology
Immunodermatology

Background:

Bullous pemphigoid (BP) is a rare autoimmune blistering disease.
Pemphigoid nodularis (PN) is a variant of BP presenting with features of prurigo nodularis.

Observation:

A 71-year-old woman presented with clinical features suggestive of PN.
The patient exhibited intense itching and nodular lesions characteristic of prurigo nodularis.

Findings:

Indirect immunofluorescence (IIF) demonstrated characteristic anti-basement membrane zone antibodies, confirming BP.
Direct immunofluorescence (DIF) results were negative, which is atypical for classical BP but can occur in PN.

Implications:

This case highlights the diagnostic challenges in pemphigoid nodularis.

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Concurrent use of both IIF and DIF is crucial for accurate diagnosis of PN.

Understanding atypical DIF findings is important for managing this BP variant.