Inferior-vena-caval thrombosis in malignant renal lesions

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Abstract
Renal tumors are the most common malignancy associated with inferior-vena-caval occlusion. The level of obstruction is usually in the middle 3rd of the vena cava. Middle vena-caval occlusion should be suspected when, in addition to the usual signs of inferior-vena-caval obstruction, the presence of albuminuria, hematuria, nephrotic syndrome, or hepatic dysfunction is demonstrated. Four cases presented here illustrate the clinical syndrome. Intravenous urography and inferior-vena-caval roentgenography are the most useful diagnostic aids. Retrograde pyelography, nephrotomography, and renal arteriography may occasionally be necessary.

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