Rubina Iqbal, Samina Khurshid, Ayesha Intasar, Misbah Khurshid.
Ruptured Ectopic Pregnancy in the Rudimentary Horn of Uterus at 14 weeks - A case report at Fatima Memorial Hospital.
Pak J Med Health Sci Jan ;6(1):275-6.

Pregnancy in the rudimentary horn is rare and represents a form of ectopic gestation. Reported incidence varies from 1:100 000 to 1:140 000 pregnancies1. Despite recent advances in ultrasound, the diagnosis of pregnancy in the rudimentary horn remains elusive with confirmatory diagnosis being made at laparotomy. Due to the variable muscular constitution of the wall of the rudimentary horn, pregnancy can be accommodated until late in pregnancy (usually in the second trimester) when rupture occurs, manifesting commonly as acute abdominal pain with high risk of maternal mortality. The rudimentary horn may or may not communicate with the uterine cavity. Most reported cases of pregnancy in the rudimentary horn have been in the non-communicating horn2. We present a case of pregnancy in the communicating horn of the uterus which ruptured at 14 weeks. Laparotomy following collapse of the patient revealed a ruptured communicating rudimentary horn with haemoperitoneum, emphasizing the difficulty of antenatal diagnoses.

PakMediNet -Pakistan's largest Database of Pakistani Medical Journals - http://www.pakmedinet.com