Risk category | Occult neck diseases | T | Primary tumor site | n (%) |
High | >30% | T3-4 | Pyriform sinus and base of tongue | 3 (8.3%) |
n = 36 | T3-4 | Lip, buccal mucosa, tongue and hard palate | 11 (30.6%) | |
T2-4 | Supraglottis | 10 (27.8%) | ||
T4 | Glottis | 11 (30.5%) | ||
T3 | Subglottis | 1 (2.8%) | ||
Intermediate | 20% - 30% | T2 | Lip, buccal mucosa and hard palate | 3 (10.3%) |
n = 29 | T1-2 | Tongue | 18 (62.1%) | |
T3 | Glottis | 8 (27.6%) | ||
Low | <20% | T1 | Lip and floor of mouth | 8 (34.78%) |
n = 23 | T1-2 | Glottis | 14 (60.87%) | |
T2 | Subglottis | 1 (4.35%) |