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Gross findings of ampullary carcinomas. a Nonexposed protruded type; b exposed protruded type; c tumor-ulcer type (predominant protruded type); d tumor-ulcer type (predominant ulcerative type); e ulcerative type; f special type (normal-appearing type); g special type (polyp type) (with permission from the Japanese Society of Biliary Surgery. Classification of biliary tract carcinoma. Second English edition. Tokyo: Kanehara; 2004.)
