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International TNM Staging System for renal cell carcinoma (RCC) classifies as T3b when "tumor grossly extends into the renal vein or its segmental branches, or vena cava below the diaphragm". The finding of microscopic invasion of the vein wall is not taken into account for TNM staging. We analyse its prognostic significance in localized and locally advanced RCC.

Valor pronóstico de la afectación microscópica de la vena renal en el cáncer de células renales