Table 3: Distribution of the primary tumor size (T) according to the site of primary tumor.
| T | Site | No | % | 
| T1 | Oral Cavity | 63 | 38.2 | 
| 
 | Larynx | 58 | 38.4 | 
| 
 | Oropharynx | 6 | 15 | 
| 
 | Hypopharynx | 3 | 7.1 | 
| 
 | Nasopharynx | 2 | 20 | 
| T2 | Oral Cavity | 80 | 48.5 | 
| 
 | Larynx | 50 | 33.11 | 
| 
 | Oropharynx | 6 | 15 | 
| 
 | Hypopharynx | 2 | 4.8 | 
| 
 | Nasopharynx | 2 | 20 | 
| 
 | Unknown 1ry site | 1 | 1.6 | 
| T3 | Oral Cavity | 14 | 8.5 | 
| 
 | Larynx | 25 | 16.6 | 
| 
 | Oropharynx | 20 | 50 | 
| 
 | Hypopharynx | 29 | 69 | 
| 
 | Nasopharynx | 4 | 40 | 
| 
 | Unknown 1ry site | 15 | 24.2 | 
| T4 | Oral Cavity | 8 | 4.8 | 
| 
 | Larynx | 18 | 11.9 | 
| 
 | Oropharynx | 8 | 20 | 
| 
 | Hypopharynx | 8 | 19.1 | 
| 
 | Nasopharynx | 2 | 20 | 
| 
 | Unknown 1ry site | 46 | 74.2 |