Symptomatic leiomyoma in a patient with a bicornuate uterus: A rare case report

Uterine anomalies are congenital malformations caused by fusion or resorption defects during embryogenesis. A bicornuate uterus is a rare condition that results from abnormal development of the paramesonephric ducts. It results from an incomplete fundus-level fusion of uterovaginal horns.

A 30-year-old female presented with a longstanding abdominal distension. An abdomino-pelvis CT scan result was suggestive of a huge right ovarian mass (25.8 × 25.9 × 14.3 cm). Intraoperatively, a bicornuate uterus with normal left cornua was encountered. The right cornua was not extending to the vagina vault and had a huge cystic mass arising from the fundus. The right cornua excision along with the mass was performed, preserving the left normal cornua and its adnexa. Histopathology confirmed the diagnosis of leiomyoma. The patient was kept in follow-up. To date, six months have passed; she has resumed her menstrual cycles and is free from symptoms.

Symptomatic fibroids in patients with a birconuate uterus are rare. Thus, diagnostic challenges can be encountered, as was seen in this case. A huge size of the fibroid in one horn of the bicornuate uterus projecting into the pelvic cavity can contribute to recurrent pregnancy loss. An MRI of the pelvis is recommended for assessment of the internal and external contours of the uterus.

A bicornuate uterus with lieomyomas is an uncommon but difficult condition. An appropriate pre-operative assessment of the mullerian anomaly type, quantity, location, and size of lieomyomas, as well as urinary tract mapping, are essential for effective management.