Bilateral localized bullous pemphigoid in a young adult patient: A case report.

Bullous pemphigoid is the most common autoimmune subepidermal blistering disease, which typically presents in the elderly. Localized bullous pemphigoid is a rare variant of bullous pemphigoid, with only about 100 cases reported up to date. In this report, we describe a 32-year-old healthy male patient with bilateral hemorrhagic bullae and erosive lesions limited to the lower extremities. A biopsy for hematoxylin and eosin stain and direct immunofluorescence established the diagnosis of bullous pemphigoid. The blistering responded well to oral and topical steroids. The exact etiology of this rare variant of bullous pemphigoid remains unknown, leading to ongoing debates and numerous suggested hypotheses.