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TNM and Stage Groupings > Kidney
Kidney
Primary Tumor (T)
| T Category |
Stage Category Definitions |
| TX |
Primary tumor cannot be assessed |
| T0 |
No evidence of primary tumor |
| T1 |
Tumor 7 cm or less in greatest dimension, limited to the kidney |
| T1a |
Tumor 4 cm or less in greatest dimension, limited to the kidney |
| T1b |
Tumor more than 4 cm but not more than 7 cm in greatest dimension limited to
the kidney |
| T2 |
Tumor more than 7 cm in greatest dimension, limited to the kidney |
| T2a |
Tumor more than 7 cm but less than or equal to 10 cm in greatest dimension,
limited to the kidney |
| T2b |
Tumor more than 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’s 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’s 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’s fascia (including contiguous extension into the
ipsilateral adrenal gland) |
Regional Lymph Nodes (N)
| N Category |
Stage Category Definitions |
| NX |
Regional lymph nodes cannot be assessed |
| N0 |
No regional lymph node metastasis |
| N1 |
Regional lymph node metastasis |
Distant Metastasis (M)
| M Category |
Stage Category Definitions |
| M1 |
Distant metastasis |
No distant metastasis (no pathologic M0; use clinical M to complete stage group)
Anatomic Stage/Prognostic Groups
| Stage |
T |
N |
M |
| I |
T1 |
N0 |
M0 |
| II |
T2 |
N0 |
M0 |
| III |
T1 or T2 |
N1 |
M0 |
| III |
T3 |
N0 or N1 |
M0 |
| IV |
T4 |
Any N |
M0 |
| IV |
Any T |
Any N |
M1 |
