Skeletal Muscle Metastases and Inferior Vena Cava Involvement in a Patient with Clear Cell Renal Cell Carcinoma and Sarcomatoid Differentiation

Introduction: Renal cell carcinoma has a propensity to propagate into the renal vein and inferior vena cava. A small percentage has distant metastasis at presentation. Pulmonary, hepatic, cerebral and bone metastases are common, but skeletal muscle involvement is rare.