[Metastasizing leiomyoma of the uterus. Apropos of 2 cases].

Metastasizing uterine leiomyomata are rare anatomical and clinical entities characterized by the early development of a uterine leiomyoma (average age 33 years), with the appearance of pulmonary metastases in the premenopausal period (average age 43 years). This clinical condition is somewhat puzzling because of two contradictory findings: the tumor's benign histology and its metastasizing capabilities. The prognosis is good due to its slow-growing characteristics and stabilization in the menopausal period.