Ruptured Rudimentary Horn Pregnancy Diagnosed by Preoperative Magnetic Resonance Imaging Resulting in Fetal Salvage

Pregnancy in a rudimentary horn is very rare. the rupture of the horn during pregnancy is anobstetric emergency which can be life-threatening for both the mother and fetus. preoperative diagnosis of such pregnancies can be challenging and they are usually diagnosed intraoperatively. we report a unique case of a 31-year-old multiparous woman who presented to the sultan qaboos university hospital in muscat, oman, in january 2013 at 32 gestational weeks with abdominal pain. ultrasonography was inconclusive. a rudimentary horn pregnancy was subsequently diagnosed via magnetic resonance imaging (mri). an emergency laparotomy revealed haemoperitoneum and a ruptured rudimentary horn pregnancy. a live baby with an apgar score of 2 at one minute and 7 at five minutes was delivered. the rudimentary horn with the placenta in situ was excised and a left salpingooophorectomy was performed. the postoperative period was uneventful. the authors recommend mri as an excellent diagnostic modality to confirm rudimentary horn pregnancies and to expedite appropriate management.