| b) Stage | |||||||
|---|---|---|---|---|---|---|---|
| Pathologic stage | Preoperative stage by magnetic resonance imaging | ||||||
| IA | IB | II | IIIA | IIIB | IIIC | IV | |
| IA | 305 (86.2%) | 24 (35.8%) | 5 (21.7%) | 3 (100%) | 0 (0%) | 24 (34.3%) | 5 (41.7%) |
| IB | 22 (6.2%) | 30 (44.8%) | 4 (17.4%) | 0 (0%) | 0 (0%) | 9 (12.9%) | 3 (25.0%) |
| II | 12 (3.4%) | 5 (7.5%) | 9 (39.1%) | 0 (0%) | 0 (0%) | 3 (4.3%) | 1 (8.3%) |
| IIIA | 0 (0%) | 3 (4.5%) | 3 (13.0%) | 0 (0%) | 0 (0%) | 2 (2.9%) | 1 (8.3%) |
| IIIB | 0 (0%) | 0 (0%) | 0 (0%) | 0 (0%) | 0 (0%) | 1 (1.4%) | 0 (0%) |
| IIIC | 12 (3.4%) | 5 (7.5%) | 1 (4.4%) | 0 (0%) | 0 (0%) | 23 (32.9%) | 1 (8.3%) |
| IV | 3 (0.9%) | 0 | 1 (4.4%) | 0 (0%) | 0 (0%) | 8 (11.4%) | 1 (8.3%) |
| Upstaged patients (%) | 13.8 | 19.4 | 21.7 | 0 | 0 | 11.4 | 0 |
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