1950～1986年我院行根治性切除大肠癌病人共821例。其中20例符合多原发大肠癌的诊断标准,占2.4%。20例中男16例,女性4例。平均年龄43.2岁。1.同时多原发大肠癌(以下简称同时癌):本组中有4例计8个原发癌。第一例系直肠癌术中探查时意外发现横结肠另有一个原发癌。此例术前钡灌肠 From 1950 to 1986, 821 cases of colon cancer patients underwent radical resection. Twenty of them met the diagnostic criteria for multiple primary colorectal cancers, accounting for 2.4%. In 20 cases, there were 16 males and 4 females. The average age is 43.2 years. 1. Simultaneous multi-primary colorectal cancer (hereinafter referred to as simultaneous cancer): There are 4 cases of 8 primary cancers in this group. The first case of colon cancer exploration unexpectedly revealed another primary cancer in the transverse colon. This example of preoperative barium enema