“…The most relevant clue to ADE diagnosis is keratinocyte pallor in the upper part of the epidermis, which has also been found in other nutritional deficiencies 2,3 . Other characteristics of ADE include confluent parakeratosis, psoriaform hyperplasia, dermal edema, neutrophilic microabscesses, and perivascular lymphohistiocytic infiltration 3,4 . Bullous ADE has been characterized histopathologically by coalesced intraepidermal vesiculation on a background of eosinophilic necrotic keratinocytes with scant spongiosis, and a predominantly lymphoneutrophilic infiltrate within the vesicles 5,6 .…”