Fig. 2From: A case report of successful treatment of pyoderma gangrenosum in a patient with autoimmune hepatitis, and review of the literatureImages of skin biopsy. a Abscess formation in the epidermis (red arrow) with accumulation of neutrophils and granuloma (green arrows) formation in the dermis. b The edge of an ulcer: deposits of eosinophilic material on the wall of the small blood vessels (blue arrow)Back to article page