Scoring system for prediction of metastatic spine tumor prognosis

Table 1 Tokuhashi score original (1990)[1-3]

Predictive factor	Score (points)
General condition (KPS)
Poor (KPS 10%-40%)	0
Moderate (KPS 50%-70%)	1
Good (KPS 80%-100%)	2
Number of extraspinal bone metastases foci
≥ 3	0
1-2	1
0	2
Number 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	0
Kidney, liver, uterus, others, unidentified	1
Thyroid, prostate, breast, rectum	2
Spinal cord palsy
Complete (Frankel A, B)	0
Incomplete (Frankel C, D)	1
None (Frankel E)	2
Total points	Mean survival periods
0-5	≤ 3 mo
6-8	≤ 12 mo
9-12	≤ 12 mo

KPS: Karnofsky’s performance status.