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%)