Table 1.
Characteristics of patients with esophageal squamous cell carcinoma
| Characteristic | n (%) |
| All patients | 46 (100) |
| Sex | |
| Male | 23 (50.0) |
| Female | 23 (50.0) |
| Age | |
| < 60 | 25 (54.3) |
| ≥ 60 | 21 (45.7) |
| Size of tumor | |
| ≤ 5 cm | 27 (58.7) |
| > 5 cm | 19 (41.3) |
| Site of tumor | |
| Upper thoracic | 4 (8.7) |
| Middle thoracic | 35 (76.1) |
| Lower thoracic | 7 (15.2) |
| Differentiation | |
| Good | 11 (23.9) |
| Moderate | 19 (41.3) |
| Poor | 16 (34.8) |
| Depth of invasion | |
| Tis, T1 | 8 (17.4) |
| T2 | 6 (13.0) |
| T3 | 32 (69.6) |
| Stage (TNM) | |
| 0-I | 7 (15.2) |
| IIa-IIb | 21 (45.7) |
| III | 18 (39.1) |
| Lymph node metastasis | |
| Negative | 27 (58.7) |
| Positive | 19 (41.3) |
| Metastasis | |
| Early metastasis | 28 (60.9) |
| Non metastasis | 18 (39.1) |