Radiology Case Reports (Mar 2024)

Uterine diverticulum mimicking endometriotic cyst of the ovary

  • Kentaro Nishiuchi,
  • Kensuke Uotani,
  • Daigo Kobayashi,
  • Yumi Ono,
  • Yuko Yamasaki,
  • Yukio Kashima,
  • Mitsuhiro Nishijima,
  • Yoshiko Ueno,
  • Izumi Imaoka,
  • Takamichi Murakami

Journal volume & issue
Vol. 19, no. 3
pp. 934 – 938

Abstract

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Uterine diverticulum is a rare congenital malformation caused by abnormal fusion of the Müllerian ducts. The diagnosis of uterine diverticulum is difficult, and it is often misdiagnosed as a Müllerian duct anomaly, degenerated uterine fibroid, or ovarian cyst. We herein report a case of uterine diverticulum mimicking an ovarian endometriotic cyst. A multiparous woman with a history of normal vaginal delivery underwent magnetic resonance imaging for investigation of lower abdominal pain and fever. A 155-mm cystic lesion was observed on the ventral side of the uterus. The content of the cyst showed high signal intensity on T1- and T2-weighted images with precipitates of low signal intensity on the dorsal side, suggesting an endometriotic cyst of the ovary. Surgical and pathological findings revealed that the cyst was pedunculated from the anterior uterine body and composed of 3 layers: CD10-positive endometrium, a smooth muscle layer, and serosa. A uterine diverticulum was definitively diagnosed.

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