原发性十二指肠癌甚为少见,临床诊断较为困难。现将我院1994年1月至1995年12月通过胃镜诊断并经病理证实的6例原发性十二指肠癌报告如下。1 一般资料本组6例病人,男5例,女1例。年龄27～65岁,平均47.7岁。发病部位球部2例,降部4例。2 内镜表现①溃疡型3例。肿块呈溃疡样,直径1.0～2.0cm,溃疡形态不规则,表现覆盖污移样苔,周围粘膜凹凸不平。其中2例位于 Primary duodenal cancer is rare and clinical diagnosis is difficult. From January 1994 to December 1995 in our hospital, six cases of primary duodenal cancer diagnosed by gastroscopy and confirmed by pathology are reported below. 1 General Information The group of 6 patients, 5 males and 1 female. Age 27 to 65 years, average 47.7 years old. Incidence of the ball in 2 cases, descending in 4 cases. 2 endoscopic manifestations of 1 ulcer type in 3 cases. The tumor was ulcer-like, with a diameter of 1.0 to 2.0 cm. The ulcer was irregular in shape and covered with smear-like moss. The surrounding mucosa was uneven. Two of them are located