近日我们对1例乙状结肠癌患者手术,发现结肠异位:右位乙状结肠,并且乙状结肠、降结肠及横结肠完全位于腹膜后,十分罕见,现报道如下。患者,男,53岁,因“大便带血2月余”入院。查体:全身皮肤无黄染,浅表淋巴结无肿大,心肺(-),腹平,无压痛,未扪及包块,直肠指检(-)。B超示:胆囊结石 Recently, we have a case of sigmoid colon surgery and found that the colon ectopic: the right sigmoid colon, and the sigmoid colon, descending colon and transverse colon completely located in the retroperitoneal, very rare, are reported below. Patient, male, 53 years old, admitted to hospital for more than 2 months with stool bloody. Physical examination: body skin without yellow dye, superficial lymph nodes without swelling, cardiopulmonary (-), abdominal flat, no tenderness, no palpable mass, digital rectal examination (-). B ultrasound shows: gallstones