我院1984年1月～1985年6月,收治80例直肠癌中50例误诊。其中男23例,女27例;年龄15～89岁,平均51岁;病程2月～3年。误诊为菌痢24例、肠炎12例、痔疮11例、菌痢伴肠炎2例、息肉1例。讨论从流行病角度看,我国大肠癌好发部位较西方国家位置低,大肠癌约50%发生于直肠,并且70%上指检可触及。本组50例外院 From January 1984 to June 1985 in our hospital, 50 cases of rectal cancer were treated and misdiagnosed. There were 23 males and 27 females; aged 15-89 years old, with an average age of 51 years; duration of illness was 2 months to 3 years. Misdiagnosis was 24 cases of bacillary dysentery, 12 cases of enteritis, 11 cases of acne, 2 cases of bacillary dysentery with colitis, and 1 case of polyps. Discussion From the epidemiological point of view, the prevalence of colorectal cancer in China is lower than that in Western countries. About 50% of colorectal cancers occur in the rectum, and 70% of the upper finger can be touched. This group of 50 exceptions