我院１９８８～１９９６年期间共收治直肠癌４１６例，其中２５４例曾有误漏诊。本文分析其误诊原因。１　临床资料１．１　一般资料　本组男１４１例，女１１３例；发病年龄２３～７７岁，平均５０．９岁，４０岁以上２０３例，约占８０％。１．２　临床表现　血便１１３例，? Our hospital received 416 cases of rectal cancer during the period from 1988 to 1996, of which 254 cases had misdiagnosis. This article analyzes the causes of misdiagnosis. 1 Clinical data 1.1 General information The group of 141 males and 113 females; age of onset 23 to 77 years old, average 50.9 years old, 40 years old and above 203 cases, accounting for about 80%. 1.2 clinical manifestations 113 cases of bloody stools,?