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| Grade of the primary lesion | Patients with cervical lymph node involvement | Patients with thoracic lymph node involvement | Patients with abdominal lymph node involvement | Patients with overall lymph node involvement |
| G1 - well differentiated (10) | 0 | 3 | 1 | 4 (40%) |
| G2 - moderately differentiated (20) | 2 | 10 | 8 | 12 (60%) |
| G3 - poorly differentiated (1) | 0 | 0 | 1 | 1 (100%) |
| Total (31) | 2 | 13 | 10 | 17 (55%) |
