| Primary site | Sex |
| ||
| Female, n (%) | Male, n (%) | Total, n (%) | ||
| Accessory sinuses | 16 (15.5) | 19 (12.8) | 35 (13.9) | |
| Hypopharynx | 1 (1.0) | 1 (0.7) | 2 (0.8) | |
| Larynx | 3 (2.9) | 31 (20.8) | 34 (13.5) | |
| Nasal cavity and middle ear | 7 (6.8) | 5 (3.4) | 12 (4.8) | |
| Nasopharynx | 13 (12.6) | 16 (10.7) | 29 (11.5) | |
| Oral cavity | 29 (28.2) | 45 (30.2) | 74 (29.4) | |
| Oropharynx | 4 (3.9) | 10 (6.7) | 14 (5.6) | |
| Salivary gland | 14 (13.6) | 17 (11.4) | 31 (12.3) | |
| Thyroid gland | 16 (15.5) | 5 (3.4) | 21 (8.3) | |
| Total | 103 (100) | 149 (100) | 252 (100) | |