The preoperative CT scan of 4 patients who had surgery for endometrioid adenocarcinoma of the ovaries were studied retrospectively and the results correlated to operative and pathological findings. 1) All tumors were bilateral. 2) Uterine involvement was diagnosed in 1 out of 3 cases. 3) Fallopian tubes involvement was present in 3 cases but was never seen on CT scan. 4) Ascites and peritoneal metastasis were correctly diagnosed in 2 out of 3 cases.