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
A 30 year old male had severely itchy papula-vesicular lesions on both knees, elbows, upper back and buttocks for one year. Direct immunofluorescence staining of the lesions showed IgA deposition at dermoepidermal junction and dermal papilla. The most probable diagnosis is :
assistant
The correct answer is  C i.e. Dermatitis herpetiformis