Fig. 2

The histopathologic findings of skin lesions. a Subepidermal blister which appears intraepidermal located at the periphery as a result of epithelial regeneration. The blister is filled with many red blood cells and small number of neutrophils, eosinophils and lymphocytes, H&E × 200. b Periodic acid Schiff (PAS) positive basement membrane is focally presented at the base of the subepidermal blister, PAS × 400