Adenomatoid Tumor Of The Ovary : A Rare Report

Problem statement: Adenomatoid tumors (AT) are rare, benign lesions of mesothelial origin. They occur mainly in reproductive organs, most commonly during the reproductive years. In women, they are more frequent in the myometrium and are the most common benign tumor of the fallopian tubes. AT are uncommon in the ovary and only a very limited number of cases were reported. We will describe a case of ovarian adenomatoid tumor, in a postmenopausal woman. Methods: Case report. Results: A 67-year-old, asymptomatic women (gravida 2, para 2), was referred to our institution for adnexal mass. She was postmenopausal from age 52 and had a personal history of hypertension. Familial history was not relevant and physical examination was unremarkable. Ultrasonography revealed a 52x33x40mm right ovarian cyst. The mass had a multilocular cystic appearance (8 locules), thin septum and minimal flow (color score 2). The uterus and the left ovary were normal in size and morphology. No free pelvic fluid was noted. The tumor marker CA 125 was in the normal range. The patient kept a regular sonographic and analytic surveillance, until an increase in size was noted, one year later. Subsequently, a laparoscopic right anexectomy was performed. Histological examination showed a multicystic adenomatoid tumor of the ovary. No abnormality was identified in the fallopian tube. Up to 6 months after excision no recurrence was detected. Conclusion: Ovarian AT are extremely rare tumors, almost always incidentally diagnosed, without specific symptoms. They have benign behavior and there are no reports of malignant transformation. Surgical excision tends to be curative. Some tumors may mimic malignant tumors, due to the multilocular cystic or solid vascularized appearance, being the histological diagnosis fundamental.