TABLE 90-8
| Table 90-8. Primary Tumor Staging Characteristics for Cancer of the Oropharynx | |
| Tx | Primary tumor cannot be assessed |
| T0 | No evidence of primary tumor |
| Tis | Carcinoma in situ |
| T1 | Tumor < 2 cm in greatest dimension |
| T2 | Tumor > 2 cm but not more than 4 cm in greatest dimension |
| T3 | Tumor > 4 cm in greatest dimension |
| T4 | Tumor invades adjacent structures, e.g., through cortical bone, soft tissue of neck, deep muscle of tongue |