Table 1.
Summary of patients with oesophageal squamous cell carcinoma (n = 60)
| T-staging (primary tumour) | Patients (percentage) |
| T1 (tumour is limited to mucosa or submucosa) | 11 (18.33%) |
| T2 (tumour invades the muscularispropria) | 12 (20.00%) |
| T3 (tumour invades the subserosa) | 37 (61.67%) |
| T4 (tumour invasion is contiguous to or exposed beyond the seorsa, or invades the adjacent structures) | 0 |
| N-staging (lymph node metastasis) | |
| N0 (no regional lymph node metastasis) | 40 (66.67%) |
| N1 (metastases in 1 to 2 positive regional lymph nodes) | 13 (21.67%) |
| N2 (metastases in 3 to 6 positive regional lymph nodes) | 6 (10.00%) |
| N3 (metastases in more than 6 positive regional lymph nodes) | 1 (1.66%) |
| M staging (distant metastasis) | |
| M0 (no distant metastasis) | 60 (100%) |
| M1 (distant metastasis) | 0 |
| G (histological grade) | |
| G1 (well-differentiation) | 22 (36.67%) |
| G2 (moderately differentiation) | 33 (55.00%) |
| G3 (poorly differentiation) | 5 (8.33%) |
| Anatomical distributions (superior margin or proximal of tumour) | |
| Lower thoracic portion | 5 (8.33%) |
| Mid-thoracic portion | 44 (73.33%) |
| Upper thoracic portion | 11 (18.34%) |