Fat cell tumors of the uterus are extremely rare; they occur with an i
ncidence of 0.03-0.2%. These tumors are almost invariably benign. We p
resent the exceptionally rare case of a low-malignant liposarcoma of t
he uterus. The histogenesis of these tumors is not completely dear. In
the literature, the theory of 'tumor metaplasia', a well-recognized p
henomenon, is favored.