Site Subsite Number diagnosed Percentage of total
Oral cavity 320 36.99
Oral tongue 137 15.84
Floor of mouth 82 9.48
Lip 33 3.82
Retromolar trigone 30 3.47
Hard palate 16 1.85
Alveolar ridge 15 1.73
Buccal mucosa 7 0.81
Larynx 188 11.33
Supraglottis 98 11.33
Glottis 90 10.40
Oropharynx 167 19.31
Tonsil 86 9.94
Base of tongue 45 5.20
Soft palate and uvula 28 3.24
Posterior pharyngeal wall 8 0.92
Hypopharynx 54 6.24
Pyriform fossa 42 4.86
Posterior cricoid 7 0.81
Lateral pharyngeal wall 5 0.58
Sinuses 35 4.05
Maxilla 22 2.54
Nasal cavity and ethmoids 13 1.50
Salivary glands 30 3.47
Parotid 19 2.20
Minor 7 0.81
Submandibular 4 0.46
Nasopharynx 25 2.89
External auditory canal 17 1.97
Unknown primary 24 2.77
Other 5 0.58