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
Extremely pruritic excoriation & papules on buttocks with autoantibodies against epidermal transglutaminase and IgA deposition in dermis on immunohistological examination of normal perilesional skin. Diagnosis is –
assistant
The correct answer is  Following information suggest the diagnosis of dermatitis herpetiformis.

Extremely pruritic
Paulo - excoriation
Buttock involved
Antibodies against epidermal transglutaminase
IgA deposition in dermis