An Extremely Giant Ovarian Mucinous Cystadenoma

Ovarian mucinous cystadenomas are cystic neoplasms lined by mucin-producing epithelial cells. They are mostly benign (80%) and frequently asymptomatic at early stages. The average diameter of ovarian mucinous cystadenomas ranges from 15 to 30 cm. Herein, we report the case of a giant benign ovarian mucinous cystadenoma in a 53-year-old postmenopausal woman. The patient presented with a very huge pelvi-abdominal distention that started ten months ago and was progressively increasing in size. It was associated with on-off abdominal pain, nausea and urinary retention. The case was discussed with a multidisciplinary team. Subsequently, the patient was consented for exploratory laparotomy. The origin of the mass was identified to be the right ovary, and right salpingo-oophorectomy was done. The resected mass measured 73x51x42 cm and weighed 108 kg. The left ovary had a multilocular mass of 15 cm in diameter, and left salpingo-oophorectomy was successively performed. There was no ascites. Histopathological examination confirmed the diagnosis of bilateral benign mucinous cystadenoma. At a postoperative 9-month follow-up in the outpatient clinic, the patient showed up in good condition without evidence of recurrence. To the best of our knowledge, we report the largest benign ovarian cyst in Saudi Arabia, and one of the largest (probably the third) in the English medical literature. It is technically feasible to manage an extremely large-sized benign mass with satisfactorily perioperative outcomes. This should be done through a multidisciplinary approach that demands an orchestrated collaboration between different specialists to yield an optimized perioperative care.