原发性十二指肠肿瘤指原发于十二指肠组织的良、恶性肿瘤。原发于胆　管上皮的壶腹　部肿瘤虽位于十二指肠，但不属此例。十二指肠肿瘤虽然仍是临床少见病种，但就其在小肠　中的单位长度发病率来看却不容忽视。　一、临床表现与诊断十二指肠肿瘤缺乏特异的临床征象，而且还可 Primary duodenal tumors refer to primary and malignant tumors of the duodenum. Although the ampullary tumor of the primary bile duct epithelium is located in the duodenum, this is not the case. Although duodenal tumor is still a rare clinical disease, but its incidence in the small intestine per unit length but can not be ignored. First, the clinical manifestations and diagnosis of duodenal tumors lack specific clinical signs, but also