Table 3.
Distribution of metastatic lymph nodes
| Level | Ipsilateral lymph node metastasis only | Contralateral lymph node metastasis only | Bilateral lymph node metastasis | Total |
|---|---|---|---|---|
| No. of patients (%) | No. of patients (%) | No. of patients (%) | No. of patients (%) | |
| Ia | 0 (0) | 0 (0) | 0 (0) | 0 (0) |
| Ib | 8 (4.5) | 0 (0) | 3 (1.7) | 11 (6.2) |
| IIa | 56 (31.8) | 9 (5.1) | 30 (17.0) | 95 (54.0) |
| IIb | 70 (39.8) | 7 (4.0) | 68 (38.6) | 145 (82.4) |
| III | 68 (38.6) | 5 (2.8) | 22 (12.5) | 95 (54.0) |
| IVa | 29 (16.5) | 3 (1.7) | 3 (1.7) | 35 (19.9) |
| IVb | 8 (4.5) | 2 (1.1) | 0 (0) | 10 (5.7) |
| Va | 44 (25.0) | 6 (3.4) | 6 (3.4) | 56 (31.8) |
| Vb | 17 (9.7) | 2 (1.1) | 1 (0.6) | 20 (11.4) |
| Vc | 2 (1.1) | 0 (0) | 1 (0.6) | 3 (1.7) |
| VI | 0 (0) | 0 (0) | 0 (0) | 0 (0) |
| VIIa | 82 (46.6) | 6 (3.4) | 35 (19.9) | 123 (69.9) |
| VIIb | 3 (1.7) | 0 (0) | 0 (0) | 3 (1.7) |
| VIII | 4 (2.3) | 0 (0) | 0 (0) | 4 (2.3) |
| IX | 0 (0) | 0 (0) | 0 (0) | 0 (0) |
| Xa | 0 (0) | 0 (0) | 0 (0) | 0 (0) |
| Xb | 1 (0.6) | 0 (0) | 0 (0) | 1 (0.6) |