Table 1.

Distribution of patients according to staging.

Clinical tumor staging
Glottic cancer
T1	T2	T3	T4
–	5	10	–
			Total	15
Supraglottic câncer
T1	T2	T3	T4
–	–	7	9
			Total	16
Pathological tumor staging
T1	T2	T3	T4
0	3	7	21
			Total	31
Clinical neck staging
cN0	cN1	cN2a	cN3
20	6	5	–
			Total	31
Pathological neck staging
pN0	pN1	pN2a	pN3
15	11	5	–
			Total	31