Table 1.

Clinicopathologic and characteristics of patients

Characteristic	No. of patients (%)
Sex
Male	15/20 (75)
Female	5/20 (25)
Age
30—39	3/20 (15)
40—49	2/20 (10)
50—59	4/20 (20)
60—69	6/20 (30)
70-	4/20 (20)
Location
Oral cavity	20/20 (100)
T classification
T1	0(0)
T2	13/20 (65)
T3	7/20 (35)
T4	0(0)
N classification
N0	10/20 (50)
N1	7/20 (35)
N2	3/20 (15)
Differentiation
Well differentiated	2/20 (60)
Moderately differentiated	7/20 (35)
Poorly differentiated	1/20 (5)
Radiation therapy
Yes	9/20 (45)
No	11/20 (55)
Chemotherapy
Yes	3/20 (15)
No	17/20 (85)

Clinical specimens were selected from patients undergoing surgical resection for head and neck squamous cell carcinoma. The tumor site was the oral cavity (tongue) in all patients.