- Patients with high-risk uterine leiomyosarcoma (LMS), International Federation of Gynecology and Obstetrics (FIGO) stage I (confined to corpus +/- cervix); patients with known uterine serosa involvement are not eligible; patients should have had, at least, a complete hysterectomy (including removal of the cervix); bilateral salpingo-oophorectomy (BSO) is not required