<prompt> Extremely pruritic excoriation papules on buttocks with autoantibodies against epidermal transglutaminase and IgA deposition in dermis on immunohistological examination of normal perilesional skin. Diagnosis isPemphigus vulgarisPemphigoidLinear IgA diseaseDermatitis herpetiformis  <response>: Following information suggest the diagnosis of dermatitis herpetiformis.Extremely pruriticPaulo - excoriationButtock involvedAntibodies against epidermal transglutaminaseIgA deposition in dermis 