Rhabdomyosarcoma with focal cartilaginous differentiation (malignant mesenchymoma) of the inferior vena cava.
A sarcoma arising from the inferior vena cava occupied the entire lumen of the inferior vena cava, right atrium, hepatic veins and common iliac veins. Its histological appearance was non-specific sarcoma, except for the presence of a few rhabdomyoblasts and some immature cartilaginous tissue. Immunohistochemically, some tumor cells were positive for myoglobin, desmin, HHF-35, and vimentin. Electron microscopy revealed that some tumor cells contained myofilaments and Z bands in the cytoplasm, which are characteristics of rhabdomyosarcoma. The tumor was diagnosed as rhabdomyosarcoma with focal cartilaginous differentiation (malignant mesenchymoma) of the inferior vena cava.
Kuwashima
Y
Y
Department of Pathology, Japanese Red Cross Medical Center, Tokyo.
Hayashi
S
S
Arata
M
M
Takemura
T
T
D000368:Aged; D005260:Female; D006801:Humans; D008637:Mesenchymoma / Q000473:pathology*; D012208:Rhabdomyosarcoma / Q000473:pathology*; D014652:Vascular Diseases / Q000473:pathology; D014682:Vena Cava, Inferior / Q000473:pathology*