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Tumour features n (%)
| Whole study group | Survival in 5-yr follow-up | |
| Stage | ||
| I | 18 (15.3) | 15 (83.3) |
| II | 48 (40.7) | 37 (77.1) |
| III | 30 (25.4) | 16 (53.3) |
| IV | 22 (18.6) | 3 (13.6) |
| Grade | ||
| I | 17 (14.4) | 13 (76.5) |
| II | 86 (72.9) | 53 (61.6) |
| III | 14 (11.9) | 5 (35.7) |
| Data missing | 1 (0.8) | 0 (0) |
| Lymph node metastasis | ||
| No | 72 (61.0) | 53 (73.6) |
| Yes | 46 (39.0) | 18 (39.1) |
| Distant metastasis | ||
| No | 96 (81.4) | 68 (70.8) |
| Yes | 22 (18.6) | 3 (13.6) |
| Mucinous carcinoma | ||
| No | 99 (83.9) | 59 (59.6) |
| Yes | 10 (8.5) | 6 (60.0) |
| Data missing | 9 (7.6) |
