system
Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
Mucous membrane pemphigoid
assistant
The correct answer is  Mucous membrane pemphigoid 
1. An autoimmune disease of mucous membranes; antibodies directed against basement membrane antigens (Laminin 5, BP180, others).
2. Clinical features
a. Affects older adults, typically over the age of 50 years.
b. Presents as multiple, painful ulcers preceded by bullae which form below the epithelium at the basement membrane.
c. Oral lesions may be found in any region, espe-cially and sometimes exclusively in the attached gingival; ocular lesions can lead to blindness if untreated.
d. Positive Nikolsky sign may be present.
e. Persistent disease.
3. Patients are managed with corticosteroids