小肠是消化道肿瘤中发病率最低的肠段,而小肠肉瘤样癌(sarcomatoidcarcinoma)更为少见。小肠肉瘤样癌好发于中老年人,无显著性别差异。临床表现以小肠梗阻及出血症状为主,如腹痛或黑大便等。由于小肠解剖部位较隐蔽,诊断时患者临床分期多为中晚期,加之肉瘤样癌分化差,故预后不 The small intestine is the lowest incidence of digestive tract bowel segment, and sarcomatoid carcinoma is more rare. Small intestinal sarcomatoid carcinoma occurs in the elderly, no significant gender differences. Clinical manifestations of small bowel obstruction and bleeding-based, such as abdominal pain or stool and so on. Due to the hidden part of the small intestine anatomy, the clinical stage of patients diagnosed mostly in the late stage, combined with sarcomatoid carcinoma differentiation is poor, so the prognosis is not