Table 3. Distribution of the clinical histopathological parameters of cancer patients treated at an otolaryngology and head and neck department .

Category	Tumor staging
	T1 and T2 n (%)	T3 and T4 n (%)	N0 n (%)	N1, N2 and N3 n (%)	M0 n (%)	M1 n (%)
Oral cavity	169 (40.14)	102 (31.19)	202 (37.75)	69 (25.46)	249 (33.73)	2 (28.57)
Larynx	105 (24.94)	114 (34.86)	160 (29.90)	64 (23.62)	208 (28.18)	-----
Pharynx	66 (15.68)	98 (27.97)	89 (16.60)	78 (28.78)	141 (19.10)	2 (28.57)
Skin	39 (9.26)	1 (0.31)	41 (7.66)	-----	41 (5.55)	-----
Thyroid	24 (5.70)	7 (2.14)	23 (4.29)	5 (1.85)	28 (3.79)	-----
Nasal cavity	5 (1.19)	3 (0.92)	7 (1.13)	1 (0.37)	8 (1.08)	-----
Other sites	13 (3.09)	2 (0.61)	13 (2.49)	3 (1.11)	15 (2.03)	-----
Unknown site	0 (0)	0 (0)	0 (0)	51 (18.82)	48 (6.54)	3 (42.86)