IMR Press / EJGO / Volume 32 / Issue 2 / pii/1630979948803-547309324

European Journal of Gynaecological Oncology (EJGO) is published by IMR Press from Volume 40 Issue 1 (2019). Previous articles were published by another publisher on a subscription basis, and they are hosted by IMR Press on as a courtesy and upon agreement with S.O.G.

Open Access Case Report
Rare case of an ovarian monodermal teratoma with functional stroma and extensive ovarian decidualization in a 74-year-old woman
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1 Pathology Laboratory and 22nd Department of Obstetrics and Gynecology, University of Athens, Aretaieion Hospital, Athens (Greece)
Eur. J. Gynaecol. Oncol. 2011, 32(2), 243–245;
Published: 10 April 2011

We present the clinicopathological findings of a rare case of a monodermal teratoma of the right ovary with functional ovarian stroma and extensive decidualization in a 74-year-old woman. The patient presented with vaginal bleeding. Ultrasound scan revealed a pelvic mass measuring 9.5 cm in the lower right abdomen. A right oophorectomy was performed. The tumor was cystic and multilocular filled with colloid material. Histological examination revealed follicles of thyroid type, and stromal clusters of fusiform or polygonal cells were found in the stroma. An extensive decidual reaction was observed. Morphological and immunohistochemical examination of the tumor revealed cystic struma ovarii with functional ovarian stroma and ectopic decidua. Total abdominal hysterectomy with oophorectomy was performed. A benign endometrial polyp, proliferative endometrium, two fibroids, and an ovarian cyst were observed.
Struma ovarii
Ovarian stroma
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