Malignant mixed Müllerian tumor of the ovary is a rare and very aggressive neoplasm presenting most commonly in postmenopausal women and is composed of adenocarcinomatous and sarcomatous elements and, depending on the types of these elements, can be classified as homologous or heterologous. It often has a poor prognosis.

A reduction in the level of performance of the kidneys in areas of function comprising the concentration of urine, removal of wastes, the maintenance of electrolyte balance, homeostasis of blood pressure, and calcium metabolism.