Rhabdomyosarcoma Originating From an Ovarian Immature Teratoma

Abstract

We report a rare case with unique histologic findings in the extra-abdominal metastases from an ovarian immature teratoma in a 33-year-old Japanese woman. The primary ovarian tumor was a grade 2 immature teratoma that contained a small aggregate of recognizable rhabdomyoblasts in addition to other immature and mature teratomatous elements. After three courses of chemotherapy, metastatic tumors were identified in the para-aortic area and a right cervical lymph node. Histologically, the para-aortic tumor was predominantly a typical embryonal rhabdomyosarcoma with minor foci of mature teratoma, whereas the cervical tumor consisted only of mature teratomatous elements without any evident immature elements. Int J Surg Pathol 2(3):245-250, 1995