Ovarian granulosa cell tumor lung metastases regressed, and symptoms were relieved, during gonadotropin-releasing hormone (GnRH) agonist analog therapy after the failure of operative treatment and cytotoxic chemotherapy, indicating the hormone dependence of the malignancy. The response was transient, but the largest metastasis did not relapse. This case report suggests that GnRH analogs may offer a new approach to the treatment of ovarian stromal cell malignancies.