A 30-year-old male had severely itchy papulo–vesicular lesions on extremities, knees, elbows and buttocks for one year. Immunofluorescence staining of the lesions showed IgA deposition at dermo-epidermal junction. The most probable diagnosis is –: (A) Pemphigus vulgaris, (B) Bullous pemphigoid, (C) Dermatitis herpetiforms, (D) Nummular eczema
Answer is C. Itchy papulovesicular lesions on extensor surfaces and deposition of IgA at DEJ suggests the diagnosis of dermatitis herpatiformis, which is associated with Coeliac disease