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- Oral cavity, oropharynx Nasopharynx, hypopharynx, larynx
- (tumor can be seen directly) (tumor cannot be seen directly)
-
- Tx Tumor cannot be measured
- T0 No evidence of primary tumors
- Tis Carcinoma in situ
- T1 Tumor no larger than 2cm(3/4in.) Tumor confined to one site
- T2 Tumor 2-4cm(3/4-1 1/2in.) Involves more than one site at origin
- T3 Tumor over 4cm(1 1/2in.) Tumor extends beyond primary site
- T4 Massive tumor, over 4cm(1 1/2in.)
- with extension to adjacent structures