Ovarian malignant immature teratoma associated with pregnancy--a case report.

We report the case of a malignant immature teratoma diagnosed at 21 weeks of amenorrhea in a 36-year-old healthy woman. Ultrasound examination showed a multilocular cystic mass of 175 mm in diameter, situated on the left side of the uterus. A left ovariectomy was performed by laparotomy at 22 weeks of amenorrhea. Histologic examination revealed a malignant grade 2 immature teratoma, and the patient underwent three courses of chemotherapy with a good pregnancy outcome. A cesarean section was carried out at 39 weeks of amenorrhea, associated with a left salpingectomy on which the pathologist examination did not find any malignant cells. The newborn had a normal aspect, and the mother was considered to be in remission after two more courses of chemotherapy..