Sulfamethoxypyridazine-responsive pemphigoid nodularis: a report of two cases.

Pemphigoid nodularis is a chronic and uncommon variant of bullous pemphigoid. The condition is characterized by the presence of prurigo nodularis-like lesions, possible history of blistering, and immunohistochemical findings of bullous pemphigoid. These patients are often unresponsive to conventional therapy with potent topical and systemic steroids and different immunosuppressive agents used alone or in combination. We describe two cases of pemphigoid nodularis treated successfully with sulfamethoxypyridazine without any adverse effects.