Table 1. Primary Tumor (T)a
| aReprinted with permission from AJCC: Kidney. In: Edge SB, Byrd DR, Compton CC, et al., eds.: AJCC Cancer Staging Manual. 7th ed. New York, NY: Springer, 2010, pp 479-89. | |
| TX | Primary tumor cannot be assessed. |
| T0 | No evidence of primary tumor. |
| T1 | Tumor ≤7 cm in greatest dimension, limited to the kidney. |
| T1a | Tumor ≤4 cm in greatest dimension, limited to the kidney. |
| T1b | Tumor >4 cm but not >7 cm in greatest dimension, limited to the kidney. |
| T2 | Tumor >7 cm in greatest dimension, limited to the kidney. |
| T2a | Tumor >7 cm but ≤10 cm in greatest dimension, limited to the kidney. |
| T2b | Tumor >10 cm, limited to the kidney. |
| T3 | Tumor extends into major veins or perinephric tissues but not into the ipsilateral adrenal gland and not beyond Gerota fascia. |
| T3a | Tumor grossly extends into the renal vein or its segmental (muscle containing) branches, or tumor invades perirenal and/or renal sinus fat but not beyond Gerota fascia. |
| T3b | Tumor grossly extends into the vena cava below the diaphragm. |
| T3c | Tumor grossly extends into the vena cava above the diaphragm or invades the wall of the vena cava. |
| T4 | Tumor invades beyond Gerota fascia (including contiguous extension into the ipsilateral adrenal gland). |
