[Leiomyosarcoma of the vena cava inferior--a rare retroperitoneal tumor]

The leiomyosarcoma of the inferior vena cava is a rare retroperitoneal tumor. In this article two more cases are reported and its clinical and diagnostic features including ultrasound, computed tomography and magnetic resonance tomography are described. Prevalence, localisation, complications, therapy and differential diagnosis are discussed based on the own cases and the current literature.