Characteristic | N = 52 |
Gender
| Male 41 Female 11 |
Age (years)
| Mean 58.6 ± 11.7 Range 31 - 79 |
Differentiation
| Well 2 Moderate 14 Poor 36 |
Location of tumor
| Upper 13 Middle 14 Lower 25 |
Depth of invasion [5]
| T1 10 T2 10 T3 0 T4 32 |
Lymph node metastasis [6]
| N0 20 N1 10 N2 14 N3 8 |
Stage [7]
| I 15 II 10 III 24 VI 3 |