Desquamative gingivitis and extragingival collapsed bulla.

Mucous membrane pemphigoid is a relatively rare, chronic scarring vesiculobullous disease that frequently affects the oral and ocular mucosa. Other mucous membranes and skin are less frequently affected. Characteristic oral lesions include desquamative gingivitis, and extragingival ulcers and collapsed vesicles and bullae. Ocular involvement may lead to blindness. Local and systemic corticoid hormones, dapsone, and periodontal therapy have all been used with variable success to treat the disease.