肠系膜原发性异位肾母细胞瘤罕见。本院见1例,报告于后。患者男,2岁。病儿无明显诱因,阵发性腹痛15小时,不排气,不吐,不泄,哭闹不止。1984年10月9日以肠梗阻入院。既往无腹部包块及腹痛史。另一孪生妹无异常表现。发育良好,营养中等。腹膨隆,中下腹有压痛和明显肌抵抗。左上腹可触及6×8cm肿物。胸透心肺无异常。B超左侧腹腔实质性占位痛变。术中见腹腔内有血性液体300ml。肠系膜上有 Mesenteric primary ectopic Wilms tumor is rare. The hospital see 1 case, the report later. Male patient, 2 years old. No obvious incentive for sick children, paroxysmal abdominal pain 15 hours, no exhaust, do not spit, do not vent, crying more than. October 9, 1984 admitted to the hospital with intestinal obstruction. No past history of abdominal mass and abdominal pain. Another twin sister no abnormalities. Well-developed, medium nutrition. Abdominal bulge, tenderness in the lower abdomen and significant muscle resistance. Left upper quadrant palpable 6 × 8cm tumor. Chest heart and lung no abnormalities. B ultra-left abdominal mass occupying pain. Intraoperative see intraperitoneal bloody fluid 300ml. Mesentery there