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Causes of loss of ambulation
| Cause | During total follow‐up period | Within 3 months after operation |
|---|---|---|
| Progression of primary cancer | 54 (73.0%) | 15 (71.4%) |
| Progression of epidural cord compression | 11 (14.9%) | 3 (14.3%) |
| Brain metastasis | 2 (2.7%) | 0 (0%) |
| Extraspinal bone metastasis | 2 (2.7%) | 0 (0%) |
| Others | 5 (6.8%) | 3 (14.3%) |
| Total | 74 (100%) | 21 (100%) |
