Forty women underwent partial sigmoid colectomy during cytoreductive surgery for advanced epithelial ovarian carcinoma. Twenty-one (53%) and nineteen (47%) received this as part of primary or secondary debulking procedures, respectively. Fifty-four percent had postoperative residual disease less than 1 cm in largest diameter. Even though multiple surgical procedures were performed in conjunction with sigmoid colectomy, 75% of the patients had no significant postoperative morbidity. Postoperative mortality was 2.5%. Seventy-eight percent avoided permanent colostomy. Despite the above morbidity rate and aggressive postoperative therapy, the median survival for the entire group was only 14.5 months, with no significant differences between groups of patients who were categorized by primary or secondary debulking, histologic grade, amount of preoperative disease, ascites, or extent of postoperative residual disease. Although a partial sigmoid colectomy can be performed with a reasonable morbidity rate as part of debulking for ovarian cancer, and probably provides significant palliation of symptoms from large pelvic tumors, it must be used judiciously in selected patients.