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| TX | Primary tumor cannot be assessed |
| T0 | No evidence of primary tumor |
| T1 | Tumor 5 cm or less in greatest dimension, no extra-adrenal invasion |
| T2 | Tumor greater than 5 cm, no extra-adrenal invasion |
| T3 | Tumor of any size with local invasion, but not invading adjacent organs |
| T4 | Tumor of any size with invasion of adjacent organs |
| NX | Regional lymph nodes cannot be assessed |
| N0 | No regional lymph node metastasis |
| N1 | Metastasis in regional lymph nodes |
| M0 | No distant metastasis |
| M1 | Distant metastasis |