Tehran University of Medical Sciences Acta Medica Iranica 0044-6025 42 5 2004 10 15 393 396 F. Ghaemmaghami H. Ayatollahi B. Daneshbodi F. Ardalan 2015 09 28 Ovarian mixed germ cell tumors consisting of endodermal sinus tumor and immature teratoma are very rare and have been reported only in a few case reports. Here we report a rare mixed germ cell tumor of ovary which was consisted of endodermal sinus tumor and immature teratoma components with an unusual intraabdominal location. Patient was a 21 years old girl with the chief compliant of abdominal pain. Ultrasound and CT scan showed a lobulated cystic mass. Laparotomy was performed and due to unusual localization, in which tumor was localized as a tumoral bridge between two ovaries, we performed maximal fertility sparing surgery by preserving ovaries, tubes and uterus. After surgery, 4 courses of chemotherapy with bleomycin, etoposide, and cis-platinum were done. Alfa feto-protein became negative after 3 courses of chemotherapy and she was under observation and in good health during follow up period. https://acta.tums.ac.ir/index.php/acta/article/view/2759 https://acta.tums.ac.ir/index.php/acta/article/download/2759/2741