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(A) Subepidermal blister with superficial inflammatory infiltrate. (B) Superficial perivascular lymphohistiocytic infiltration, with moderate infiltration of eosinophils. Linear staining for (C) IgG, (D) C3 at the basement membrane zone. (A) H&E, ×40; (B) H&E, ×100; (C) direct immunofluorescence (DIF), ×100; (D) DIF, ×100.
