Figure 3
Histological findings (hematoxylin-eosin staining; overview 40x, inset 200x; Punch biopsy from left upper arm): neutrophils and lymphocytes forming intraepithelial pustules (inset A, red arrow), aggregated neutrophilic granulocytes in parakeratotic foci (inset B, red arrow), orthokeratosis associated with parakeratosis and mild superficial perivascular lymphocytic infiltrates around dilated vessels (insert C, red arrow).