| Favorable site |
Orbit; nonparameningeal head and neck; genitourinary excluding kidney, bladder, and prostate; biliary tract. |
| Unfavorable site |
Any site not considered favorable. |
| T1 |
Tumor confined to anatomic site of origin. |
| T2 |
Tumor extension and/or fixative to surrounding tissue. |
| a |
Tumor ≤5 cm in maximum diameter. |
| b |
Tumor >5 cm in maximum diameter. |
| N0 |
No clinical regional lymph node involvement. |
| N1 |
Clinical regional lymph node involvement. |
| NX |
Regional lymph nodes not examined; no information. |
| M0 |
No metastatic disease. |
| M1 |
Metastatic disease. |
