直肠癌是肛肠外科的常病，青年人直肠癌有其特殊性，误诊、漏诊时有发生。现就我院自１９８０年以来遇到的青年人直肠癌２０例误诊原因作一讨论。１　临床资料１１　一般资料　男性１４例，女性６例，年龄１９～３０岁，平均２６５岁，出现最初症状至入院时间２～９个月１ Rectal cancer is a common disease in anorectal surgery. Young people have specific characteristics of rectal cancer, and misdiagnosis and missed diagnosis occur from time to time. Now we discuss the causes of misdiagnosis of 20 cases of rectal cancer in young people in our hospital since 1980. 1 Clinical data 11 General information 14 males and 6 females, aged 19 to 30 years, mean 26 to 5 years old, with initial symptoms to admission time 2 to 9 months 1