Uterine benign-appearing smooth muscle tumor "metastatic" to the lungs: a case report.

A case of pulmonary fibroleiomyomatosis secondary to a uterine "metastasizing" leiomyoma, with aspects of vascular invasion, is reported. Although we cannot exclude the existence of primitive pulmonary forms, which we do not consider to be of a hamartomatous nature, we believe that a careful examination of the uterus for the presence of angioinvasive leiomyoma is mandatory.