Serous Cystadenoma Associated with Cystic Struma Ovarii: A Rare Entity

Abstract

Abstract

Background: Struma ovarii is a rare entity, with only 150 reported cases in the medical literature. Struma ovarii belongs to the group of monodermic and highly specific teratomas. Struma ovarii comprises <5% of mature teratomas. This condition is defined by the presence of thyroid tissue composed of >50% of the overall mass. Most commonly, a struma ovarii occurs as part of a teratoma but may occasionally be encountered with serous or mucinous cystadenomas. Case: A 28-year-old female presented with a mass in her right ovary. After ultrasonography and blood testing, this patient underwent an abdominal laparotomy, followed by a right ovarian cystectomy. Histopathologic examination of the resected material revealed that the cyst wall was composed mainly of thyroid tissue in the form of follicles filled with colloidal matter along with areas of serous cystadenoma. Results: This patient's postoperative course was normal, and her thyroid hormone levels remained normal. Conclusions: For the vast majority of cases of struma ovarii, diagnosis is difficult prior to surgical intervention, and surgical resection of the ovary and standard surgical follow-up is sufficient for treating this benign, unilateral disease, which occurs rarely. (J GYNECOL SURG 30:58)