原发性小肠肿瘤发病率低，误诊率高。特别是以消化道出血为主要症状时，常易误诊为其他疾病。作者近年遇到4例，现就误诊原因及教训作一分析。资料本组共4例，男性3例、女性1例。例1为女性，56岁，主诉反复黑便半年、腹部肿块3个月。发病后即就医，诊为“胃溃疡出血”。经治疗 The incidence of primary small bowel tumors is low and the rate of misdiagnosis is high. Especially when gastrointestinal bleeding is the main symptom, it is often misdiagnosed as other diseases. In recent years, the author encountered 4 cases, and now analyzes the causes and lessons of misdiagnosis. There were 4 cases of data in this group, including 3 males and 1 female. Example 1 is a female, 56 years old, complained of repeated blackness for half a year and abdominal mass for 3 months. After the onset of illness, he was treated as a doctor and diagnosed as “bleeding of stomach ulcer”. Treated