[Uterine smooth muscle tumors--direction of differentiation and morphological features].

Uterine smooth muscle tumors /USMT/ are the most common tumors of the female reproductive system. The main aim of the clinical histological classification and the grading of MGMT is to predict their progression. The diagnosis of USMT has of the following stages: the determination of the direction of differentiation of the tumor and the defining the morphological features (the mitotic index, the tumor necrosis and the cellular atypia). In each of them there are specific problems. This indicates, that the USMT are therapeutic and clinical challenge.