Table 2. Tokuhashi's Evaluation System for the Prognosis of Metastatic Spine Tumor.
| Variable | Score |
|---|---|
| General condition (performance status) | |
| Poor (PS 3, 4) | 0 |
| Moderate (PS 2) | 1 |
| Good (PS 0, 1) | 2 |
| No. of extraspinal bone metastases foci | |
| ≥ 3 | 0 |
| 1–2 | 1 |
| 0 | 2 |
| No. of metastases in the vertebral body | |
| ≥ 3 | 0 |
| 2 | 1 |
| 1 | 2 |
| Metastases to the major internal organs | |
| Unremovable | 0 |
| Removable | 1 |
| No metastases | 2 |
| Primary site of the cancer | |
| Lung, stomach, bladder, esophagus, pancreas | 0 |
| Liver, gallbladder, unidentified | 1 |
| Others | 2 |
| Kidney, uterus | 3 |
| Rectum | 4 |
| Thyroid, breast, prostate, carcinoid tumor | 5 |
| Palsy | |
| Complete (Frankel A, B) | 0 |
| Incomplete (Frankel C, D) | 1 |
| None (Frankel E) | 2 |
Criteria of predicted prognosis: total score 0–8 ≤ 6 mo; total score 9–11 ≥ 6 mo; total score 12–15 ≤ 1 y. PS, performance status.