| Stage | Sites | Tumor stage invasiveness | T stage size | N | M |
| 1 | Orbit Head and neck Genitourinary Biliary tract | T1 or T2 | a or b | Any N | M0 |
| 2 | Bladder/prostate Extremity Cranial parameningeal Other | T1 or T2 | a | N0 or NX | M0 |
| 3 | Bladder/prostate Extremity Cranial parameningeal Other | T1 or T2 | a | N1 | M0 |
| b | Any N | ||||
| 4 | All | T1 or T2 | a or b | N0 or N1 | M1 |
| T: Tumor stage | N: Regional nodes | M: Metastases | |||
| T1: Confined to anatomic site of origin T2: Extension a: ≤5 cm in diameter b: >5 cm in diameter | N0: Not clinically involved N1: Clinically involved NX: Clinical status unknown | M0: No distant metastases M1: Distant metastases present | |||