Inferior Vena Cava Leiomyosarcoma

**Semantic type:** Neoplastic Process

**Definition:** An aggressive malignant smooth muscle neoplasm, arising from the inferior vena cava. It is characterized by a proliferation of neoplastic spindle cells.

**Synonyms:** - Leiomyosarcoma of Inferior Vena Cava - Leiomyosarcoma of the Inferior Vena Cava