子宫内膜异位症种植在结肠者较罕见。如仅侵犯直肠、乙状结肠,其临床症状常与月经来潮有密切关系,但有时不够典型。故术前确诊常较困难。据Kimbrough和Davis估计,直、乙状结肠子宫内膜异位症无临床症状者占25％,其中约2—3％可深达直肠壁,临床易误诊为直肠癌。我们在1971—1981年,收治直肠子宫内膜异位症4例。术前诊断直肠肿瘤、盆腔肿瘤、直肠子宫内膜异位 Endometriosis is rare in colon. If only violated the rectum, sigmoid colon, its clinical symptoms often associated with menstrual cramps, but sometimes not typical. Therefore, preoperative diagnosis is often more difficult. According to estimates by Kimbrough and Davis, straight, sigmoid colon endometriosis no clinical symptoms accounted for 25%, of which about 2-3% of deep rectal wall, clinical misdiagnosed as rectal cancer. In 1971-1981, we treated 4 patients with rectal endometriosis. Preoperative diagnosis of rectal cancer, pelvic tumors, rectal endometriosis