Rajbhandary, SanyuktaDas, AnamikaRai, MausamSah, Archana Kumari2026-08-062026-08-062020https://hdl.handle.net/20.500.14572/7147Sanyukta Rajbhandary Department of Obstetrics and Gynecology, B.P Koirala Institute of Health Sciences, Ghopa, Dharan, Nepal Anamika Das Department of Obstetrics and Gynecology, B.P Koirala Institute of Health Sciences, Ghopa, Dharan, Nepal Mausam Rai Department of Obstetrics and Gynecology, B.P Koirala Institute of Health Sciences, Ghopa, Dharan, Nepal Archana Kumari Sah Department of Obstetrics and Gynecology, B.P Koirala Institute of Health Sciences, Ghopa, Dharan, NepalAbstract Rudimentary horn is a mullerian anomaly that is a variant of unicornuate uterus. Rudimentary horn pregnancies are rare and associated with increased maternal morbidity and mortality. Diagnosis of rudimentary horn pregnancy and its rupture in a woman with previous vaginal delivery is challenging. Although ultrasonography is an important diagnostic tool, it has low sensitivity in making diagnosis of ruptured rudimentary horn pregnancy. Therefore, clinicians should have high index of suspicion in such cases. We report a case of G3P2L2 at 15 weeks period of gestation referred to our centre as a case of intrauterine pregnancy with acute abdomen. She underwent emergency laparotomy and was found to have ruptured rudimentary horn intraoperatively. Excision of the ruptured rudimentary horn and ipsilateral salpingectomy was done and the patient had an uneventful postoperative recovery. Keywords: acute abdomen; case report; hemoperitoneum; mullerian anomalies, rudimentary horn.en-USacute abdomencase reporthemoperitoneummullerian anomaliesrudimentary hornArticle