Version June 2024
| Primary tumor (T) | |||
| T category | T criteria | ||
| TX | Primary tumor cannot be assessed | ||
| T0 | No evidence of primary tumor | ||
| Ta | Papillary noninvasive carcinoma | ||
| Tis | Carcinoma in situ | ||
| T1 | Tumor invades subepithelial connective tissue | ||
| T2 | Tumor invades the muscularis | ||
| T3 | For renal pelvis only: Tumor invades beyond muscularis into peripelvic fat or into the renal parenchyma. For ureter only: Tumor invades beyond muscularis into periureteric fat. | ||
| T4 | Tumor invades adjacent organs, or through the kidney into the perinephric fat | ||
| Regional lymph nodes (N) | |||
| N category | N criteria | ||
| NX | Regional lymph nodes cannot be assessed | ||
| N0 | No regional lymph node metastasis | ||
| N1 | Metastasis ≤2 cm in greatest dimension, in a single lymph node | ||
| N2 | Metastasis >2 cm, in a single lymph node; or multiple lymph nodes | ||
| Distant metastasis (M) | |||
| M category | M criteria | ||
| M0 | No distant metastasis | ||
| M1 | Distant metastasis | ||
| Prognostic stage groups | |||
| When T is... | And N is... | And M is... | Then the stage group is... |
| Ta | N0 | M0 | 0a |
| Tis | N0 | M0 | 0is |
| T1 | N0 | M0 | I |
| T2 | N0 | M0 | II |
| T3 | N0 | M0 | III |
| T4 | NX, N0 | M0 | IV |
| Any T | N1 | M0 | IV |
| Any T | N2 | M0 | IV |
| Any T | Any N | M1 | IV |
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