Fibrothecomas are mesenchymal tumors deriving from the ovarian stromal and consisting of theca-like elements and fi brous tissue. They are common, but their malignant counterpart is extraordinarily rare. Classical malignant fi brothecomas are said to show four or more mitotic fi gures per 10 high power fi elds. We have experienced a rare case of malignant ovarian fi brothecoma in a 72-year-old postmenopausal woman. We report a case with brief review of literature.Keywords: Thecoma; Fibroma; Malignant neoplasms; Ovary; Mitotic Index Received: 2011.10.8. Revised: 2011.12.20. Accepted: 2012 Th is is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/ by-nc/3.0/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
Copyright © 2012. Korean Society of Obstetrics and GynecologyFibrothecomas are benign neoplasms which belong to the estrogenic group of sex cord tumors with differentiation in fi broblastic or theca cells. Fibroma is purely composed of mature fi broblastic cells producing abundant collagen and thecoma contains many cells resembling theca cells and/or lutein cells as well as a number of fibroblastic cells. However, in some instances, differentiation between fi broma and thecoma is often diffi cult, justifying use of the term 'fi brothecoma'. Malignant ovarian fi brothecoma is a rare entity. Classical malignant fi brothecomas are said to show four or more mitotic fi gures per 10 high power fi elds (HPF). These tumors occur generally in older menopausal patient. Histologically, these tumors have a stromal origin and are composed of variable proportion of spindle cells forming collagen and theca cells containing lipids. They may be hormonally active and thus responsible for estrogenic manifestations. We report a rare case of malignant ovarian fibrothecoma in a 72-year-old postmenopausal woman.
Case ReportA 72-year-old gravida 3 para 2 postmenopausal woman with no signifi cant medical history presented to our gynecology outpatient clinic with constipation and abdominal distention. No associated fever, vomiting, or localized abdominal pain occurred. The pelvic examination revealed a palpable non-tender pelvic mass. Transvaginal ultrasonogram shows a 11.3 ×11.7 ×10.2 cm sized well defi ned heterogenous echoic solid mass with some tiny cystic changes abutting on atrophic uterus in right adnexa (Fig. 1). The result of laboratory studies, including analysis of tumor markers, such as CA-125, CA19-9, squamous cell carcinoma related antigen were all within normal limits. At laparotomy, there was no ascites and a lobulated bulging mass measuring 15 cm was observed on the right ovary. The left ovary, uterus, omentum, and pelvic lymph node were unremarkable. A frozen section of the ovarian mass revealed a sex-cord stromal tumor with nuclear atypia and mitosis. The patient underwent abdominal total hystrectomy, bilateral salpingo-oophorectomy,...