[Bilateral mature teratoma and pregnancy: case report].

We report a case of a 21 years old woman, pregnant (14.1 weeks of gestation), and with 24 hours of abdominal pain received at the emergency room. During examination we found gravid uterus and a mass in the right inguinal area and flank, independent from uterus, painful and with no uterine activity. We perform an obstetric ultrasound with this results: 13 weeks pregnancy and right adnexal cystic tumor with 15 x 14 cm. Patient undergo to emergency exploratory laparotomy, with previous application of indomethacin end progesterone. During surgery performance we observe a bilateral adnexal masse, right side affecting the complete ovary (salpingactomized), and left side extirpated leaving functional tissue ovary. Three days after, patient leaves the hospital without any complication. Pathology reports a bilateral mature teratoma.