卵巣腫瘍の術前診断で腹腔鏡下手術を行った尿膜管嚢胞の一例

抄録

Objective: To report a rare case of a urachal remnant cyst mimicking a benign ovarian cyst.

Case: A 50-year-old female was referred to our department because of a right ovarian tumor increasing in size. A pelvic examination revealed a 7 cm cystic tumor in the right adnexal region, and magnetic resonance imaging and computed tomography showed a 7 cm tumor without a solid component. Tumor markers were not elevated. We decided to perform laparoscopic surgery, and the port was inserted in a parallel fashion due to the tumor in the midline of the lower abdomen, which originated in the mural peritoneum and was connected to the bladder apex. The bilateral appendages were normal, and the cystoscopy showed normal bladder mucosa. The urologist resected the tumor under laparoscopic surgery. Postoperative pathological examination revealed no neoplastic findings in the epithelium, and the patient was diagnosed with a urachal remnant cyst.

Conclusion: We reported a case of a urachal remnant cyst that was difficult to distinguish from an ovarian tumor preoperatively. Although gynecologists rarely experience urachal disease, we were able to complete the laparoscopic surgery with the urologist.