Fig. 14From: The inferior vena cava: anatomical variants and acquired pathologiesIVC Leiomyosarcoma. a Coronal CT image shows a large lobulated heterogeneously enhancing mass (arrow) between the liver and right kidney. It demonstrates both intra and extraluminal growth. On axial MRI, the lesion (arrows) is (b) homogeneously T1 hypointense to skeletal muscle, (c) enhances heterogeneously, and (d) is heterogeneously T2 hyperintense. Some non-enhancing areas are bright on T2 weighted sequences, suggestive of cystic or necrotic components. MRI also demonstrates a positive embedded organ signBack to article page