Table 1 Patient characteristics

Sex

 Male

23

 Female

13

Age

 Mean

67.3 ± 10.0

 Range

37–88

Primary tumor sites

 Oral tongue

16

 Gum

12

 Floor of mouth

8

T classification

 T1

5

 T2

16

 T3

7

 T3

8

N classification

 N0

23

 N1

3

 N2a

1

 N2b

7

 N2c

2

Neck dissections

 Ulilateral

32

 Bilateral

4

Type of neck dissection

 SOHND (levels I–III)

15

 Extended SOHND (levels I–IV)

5

 MRND, typeIII(levels I–V)

19

 LND (levels II–IV)

1