Functional ovarian cysts in patients cured of ovarian neoplasms.

Twenty-seven patients with ovarian cancer underwent unilateral salpingo-oophorectomy and were followed for 12-215 months (mean 80) after completion of therapy. Of these, nine patients who received pelvic irradiation subsequently developed ovarian failure. Of the remaining 18 patients who maintained ovarian function, 13 (72%) developed a functional ovarian cyst during the follow-up period. Of these 13 patients, eight were observed until the functional cyst regressed, four were treated with oral contraceptives (OCs) to suppress ovarian function, and one underwent oophorectomy for a large corpus luteum cyst. We recommend that OC pills be considered for suppression of ovarian function in postmenarcheal girls after completion of therapy for ovarian neoplasms. Routine use of OCs may simplify the follow-up of these patients by preventing the formation of functional ovarian cysts. In postmenarcheal patients not treated with OCs, the finding of a unilocular ovarian cyst should be considered to represent a functional cyst, and a trial of OCs for 3 months may result in spontaneous regression. Persistent cysts must be operatively removed.