Table 1.
Summary of the patients with instrumentation failure
| Case No. | Sex | Age (years) | Primary tumor | Metastatic vertebrae | Instrumentation failure (bone grafting; yes or no) | Instrumentation failure time after surgery (days) | Survival time after surgery (days) |
|---|---|---|---|---|---|---|---|
| 1 | M | 65 | Liver | C | SD & SL (yes) | 2 | 84 |
| 2 | F | 49 | Lung | T | SD (yes) | 3 | 1313 |
| 3 | F | 46 | Breast | T | SL (no) | 12 | 884 |
| 4 | F | 44 | Gall bladder | C | SL (yes) | 45 | 140 |
| 5 | F | 51 | Thyroid | C | SD (no) | 48 | 243 |
| 6 | M | 67 | Vascular | T | SD & SL (no) | 75 | 225 |
| 7 | M | 79 | Lung | L | SL (yes) | 79 | 142 |
| 8 | M | 66 | Lung | L | SL (no) | 168 | 731 |
| 9 | M | 53 | Liver | C | SD & SL (yes) | 178 | 349 |
| 10 | M | 65 | Prostate | T | SL (yes) | 212 | 574 |
| 11 | M | 69 | Esophagus | L | SD & SL (yes) | 295 | 477 |
| 12 | F | 73 | MUO | T | SL (yes) | 299 | 545 |
| 13 | M | 53 | Lung | T | SL (yes) | 451 | 871 |
| 14 | F | 51 | Lung | L | RF (no) | 1212 | 1434 |
| 15 | F | 45 | Thyroid | C | SL (no) | 4948 | 6103 |
M : male, F : female, C : cervical spine, SD : strut displacement, SL : screw loosening, T : thoracic spine, L : lumbar spine, RF : rod fracture