[A rare etiology of praevia barrier by the non gravid uterus in a duplex uterus (didelphys): ultrasound findings].

The Authors report a rare case of praevia barrier from a duplex uterus (didelphys). A 30 Year old pregnant woman was admitted for ultrasound examination. Her past history included two cesarean sections with a stillborn infant in one case and a live infant with psychomotor retardation in the other case. Third trimester ultrasound examination was consistent with a 36-37 weeks gestation. A 9.1 by 5.8 cm retro-cervical praevia mass was also noted deep in the pelvis. The mass was similar in appearance to myometrium. Elective cesarean section performed at 38 weeks of gestation delivered a normal healthy 2950 g male infant and revealed a second non gravid uterus corresponding to the mass seen at ultrasound. Pelvic examination confirmed a diagnosis of uterus didelphys (uterus duplex bicornis bicollis with vaginal septum) separated by a sagittal partition. The post-operative course was uneventful. Praevia barrier by a half uterus in a patient with duplex uterus is a rare condition that can easily be detected by careful ultrasound examination thus preventing complications at delivery.