<prompt> Extremely pruritic excoriation and papules on buttocks with autoantibodies against epidermal transglutaminase and IgA deposition in dermis on immunohistological examination of normal perilesional skin. Diagnosis is? NOT RELATED- DERMATOLOGYPemphigus vulgarisPemphigoidLinear IgA diseaseDermatitis herpetiformis  <response>: . 