|
Variable
|
No.
|
%
|
|---|
|
Age (years)
|
Median 57 (range 38-74)
| |
|
Gender
| | |
|
Male
|
41
|
82
|
|
Female
|
9
|
18
|
|
Primary site
| | |
|
Nasopharynx
|
25
|
50
|
|
Oropharynx
|
12
|
24
|
|
Hypopharynx
|
9
|
18
|
|
Larynx
|
4
|
8
|
|
T classification
| | |
|
1
|
14
|
28
|
|
2
|
19
|
38
|
|
3
|
8
|
16
|
|
4
|
9
|
18
|
|
N classification
| | |
|
1
|
12
|
24
|
|
2
|
30
|
60
|
|
3
|
8
|
16
|
|
Stage
| | |
|
2
|
7
|
14
|
|
3
|
14
|
28
|
|
4
|
29
|
58
|
|
Histology
| | |
|
Squamous cell carcinoma
|
25
|
50
|
|
Nonkeratinizing undifferentiated carcinoma
|
22
|
44
|
|
Nonkeratinizing differentiated carcinoma
|
1
|
2
|
|
Keratinizing squamous cell carcinoma
|
2
|
4
|
|
Differentiation
| | |
|
Well differentiated
|
3
|
6
|
|
Moderate differentiated
|
8
|
16
|
|
Poorly differentiated
|
6
|
12
|
|
Undifferentiated
|
22
|
44
|
|
Not available
|
11
|
22
|
|
Initial maximal lymph node size (cm)
|
Median 2 (range 1-7)
| |
