title: [The tumor thrombus in renal vein and inferior vena cava proved by duplex ultrasound. A case report].
mesh_terms: D002292:Carcinoma, Renal Cell / Q000175:diagnosis*; D006801:Humans; D007680:Kidney Neoplasms / Q000175:diagnosis*; D008297:Male; D008875:Middle Aged; D012082:Renal Veins; D014463:Ultrasonography; D014682:Vena Cava, Inferior