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Malignant mixed mullerian tumor: A case series

Carla Lenice Lee, MBA, MD and Ana Victoria V. Dy Echo, MD, FPOGS, FSGOP
Department of Obstetrics and Gynecology, The Medical City

Uterine carcinosarcoma, also known as malignant mixed mullerian tumor (MMMT) is a rare and aggressive malignancy. It is the only type of uterine carcinoma with both an epithielial-derived carcinoma and a mesodermal-derived sarcoma. Classically, they have been considered as a soft tissue sarcoma, however, recent studies ascertain the pathogenesis of carcinosarcomas as to that of a metaplastic transformation of a carcinoma to give rise to a sarcomatous component. With the paradigm shift on the pathogenesis of disease, treatments have been aligned to follow protocols used in aggressive uterine carcinomas and are in further evaluation for its applicability to the aforementioned carcinosarcoma.

This paper presents three cases of MMMT diagnosed in a Private Tertiary Hospital from October 2015 to February 2017. Among the three cases, two cases underwent endometrial sampling with results suggestive of MMMT and one case with an intraoperative frozen section done revealing carcinosarcoma. All cases underwent extrafascial hysterectomy with bilateral salpingo-oophorectomy (EHBSO) and bilateral lymph node dissection (BLND). Post-operatively, two of the cases underwent adjuvant chemotherapy and are currently alive. The one case that did not receive adjuvant chemotherapy succumbed to the disease eight months after diagnosis.

With the high propensity of MMMT to metastasis, relapse and recurrence, it is then imperative that all cases are properly managed.