Relationship between endometriosis, endometrioid adenocarcinoma, gliomatosis peritonei, and carcinoid tumor in a patient with recurrent ovarian teratoma.

Gliomatosis peritonei (GP) describes the implantation of mature neuroglial tissue in the peritoneum and is usually associated with mature ovarian teratoma but is also found in cases of immature teratoma. We report the case of a patient with recurrent mature ovarian teratoma, GP, endometriosis (with malignant transformation), and carcinoid tumor, found at the time of hysterectomy for a primary endometrial adenocarcinoma. This unusual combination of tumor types has not been reported earlier.