Basic characteristics | Number of patients (%) |
Age (mean ± SD) (yr) | 71.7 ± 8.2 |
Gender | |
Male | 24 (68.6) |
Female | 11 (31.4) |
Histological type | |
Well/moderately differentiated | 15 (42.9) |
Poorly-differentiated | 20 (57.1) |
Lymphatic invasion | |
Negative | 16 (45.7) |
Positive | 19 (54.3) |
Venous invasion | |
Negative | 9 (25.7) |
Positive | 26 (74.3) |
Lymph node metastasis | |
N0 | 16 (45.7) |
N1 | 8 (22.9) |
N2 | 1 (2.9) |
N3 | 10 (28.6) |
Depth of tumor invasion | |
T1 | 11 (31.4) |
T2 | 4 (11.4) |
T3 | 8 (22.9) |
T4 | 12 (34.3) |
Stage | |
I | 15 (42.9) |
II | 6 (17.1) |
III | 7 (20.0) |
IV | 7 (20.0) |