Table 1. T staging of RCC according to 2010 AJCC clinical staging.

T stage	Description
T1
T1a	<4, confined to kidney
T1b	>4 but <7 cm, confined to kidney
T2
T2a	>7 but <10 cm, confined to kidney
T2b	>10 cm, confined to kidney
T3
T3a	Tumor thrombus in segmental renal vein branches or main renal vein or tumor invades perineal fat but does not extend beyond Gerota’s fascia
T3b	Tumor thrombus extends into IVC but remains below diaphragm
T3c	Tumor thrombus extends into IVC and above the diaphragm or tumor invades the wall of the IVC
T4	Tumor invades beyond Gerota’s fascia; tumor invades ipsilateral adrenal gland

RCC, renal cell carcinoma.