T — Primary tumour |
T1 | Tumour ≤ 7 cm in greatest dimension, limited to the kidney |
T1a | Tumour ≤ 4 cm |
T1b | Tumour > 4 cm but ≤ 7 cm |
T2 | Tumour > 7 cm in greatest dimension, limited to the kidney |
T2a | Tumour > 7 cm but ≤ 10 cm |
T2b | Tumour > 10 cm but limited to the kidney |
T3 | Tumour extends into major veins or perinephric tissues but not into ipsilateral adrenal gland and not beyond the Gerota fascia |
T3a | Tumour extends into the renal vein or its segmental branches, or invades the pelvicalyceal system, or perirenal or renal sinus fat |
T3b | Tumour grossly extends into the vena cava below the diaphragm |
T3c | Tumour grossly extends into the vena cave above the diaphragm or the wall of the vena cava |
T4 | Tumour invades beyond the Gerota fascia (including contiguous extension into the ipsilateral adrenal gland) |
N — Regional lymph nodes |
N0 | No regional lymph node metastasis |
N1 | Metastasis in regional lymph node(s) |
M — Distant metastasis |
M0 | No distant metastasis |
M1 | Distant metastasis |
TNM stage grouping |
Stage I | | T1 | N0 | M0 |
Stage II | | T2 | N0 | M0 |
Stage III | | T3 | N0 | M0 |
T1, T2, or T3 | N1 | M0 |
Stage IV | | T4 | Any N | M0 |
Any T | Any N | M1 |