Abstract

1. Abstract
A uterine anomaly may increase the risk of preterm birth, breech presentation, placenta previa, placental abruption, intrauterine growth retardation and ectopic pregnancy [1]. Unicornuate uterus with rudimentary horn occurs due to failure of complete development of one of the Müllerian ducts and incomplete fusion
with the contralateral side. Most patients are asymptomatic, but this rudimentary horn may contain a cavity with endometrium and be the seat of pregnancy implantation. Perruptured diagnosis of pregnancy in rudimentary horn with ultrasonography is a technical difficulty with a sensitivity of 30% [2]. Ultrasound sensitivity remains only 26%; the enlarging horn with the thinned myometrium can obscure the adjacent anatomical structures, and the sensitivity
further decreases as the gestation progresses. MRI has proven to be a beneficial diagnostic tool [3]. We report a case of ruptured noncommunicated rudimentary horn at 22 weeks of gestation in women with previous cesarean delivery because of breech presentation in unicornuate uterus, and the rudimentary right horn was not found. Also, in this pregnancy, she had a routine scan in which the diagnosis was missed. In our opinion, routine excision of the
rudimentary horn should be undertaken during a nonpregnant state laparoscopically or during the first cesarean delivery.