[Intravenous leiomyomatosis of the uterus. Report of a case].

A clinicopathological study of a case of intravascular leiomyomatosis was performed, recalling the rarity of this pathology and the necessity of a careful follow-up. Microscopically the intravascular tumor resembles the benign leiomyoma. Authors have taken into consideration the most likely differential diagnoses: endolymphatic stromal myosis and low-grade leiomyosarcoma, they study the problem of the so-called "benign metastasizing leiomyoma" and emphasize that intravenous leiomyomatosis is frequently underdiagnosed.