Fiftyeight cases of leiomyosarcoma of the uterus and 47 endometrial satcomas on the uterus are reviewed based on the pertiment information related to recurrence patterns. The following conclusions are made: 1) Cases of endometrial sarcoma should receive preoperative pelvic in radation, or postoperative pelvic irradiation if a diagnosis is not made until the postoperative period. This plan will probably be of most benefit, if at all in sage I disease 2) A case for pelvic irradiation as an adjuvant to surgery in leiomyosarcoma caunot be made from a review of this material either froma viewpoint of recurrence patterns or radio-responsiveness.