Table 1 Demographic characteristics of patients

Age (years)

< 50

16 (40.0)

≥ 50

24 (60.0)

Race

Persian

9 (22.5)

Azari

13 (32.5)

Gilaki and Mazani

4 (10.0)

Kurd

4 (10.0)

Lor

3 (7.5)

Unknown

7 (17.5)

Stage

I-II

29 (72.5)

≤ III

11 (27.5)

Histology grade

Grade I (low-well differentiated)

4 (10.0)

Grade II (intermediate-moderately

22 (55.0)

differentiated)

Grade III (high-poor differentiated)

14 (35.0)

Tumor size (cm)

< 5

25 (62.5)

≥ 5

15 (37.5)