我院及莱阳市中心医院 1995～ 1999年 6月收治直肠癌 78例 ,其中误诊 44例 ,误诊率为 5 6 .4% ,将误诊情况分析如下。1　临床资料44例误诊患者中男性 2 7例 ,女性 17例 ,男女比为 1.5 9∶1。年龄最小 2 5岁 ,最大 81岁 ,平均 5 5岁 ,其中 45～ 6 5岁 30例 ,占误诊总数 6 8.2 %? In our hospital and Laiyang Central Hospital from June 1995 to June 1999, 78 cases of rectal cancer were diagnosed, of which 44 cases were misdiagnosed. The misdiagnosis rate was 56.4%. The misdiagnosis situation was analyzed as follows. 1 Clinical data 44 out of 44 misdiagnosed patients were males and 17 females with a male to female ratio of 1.5 9:1. The youngest is 2 5 years old, the oldest is 81 years old, and the average is 5 5 years old. Among them, 30 cases are 45 to 65 years old, accounting for 6 8.2% of the total misdiagnosis.