| Metastatic spinal tumour | Unknown primary tumour | Known primary tumour |
| Lung | 4 patients (80%) | 18 patients (51.4%) |
| Colorectal | 1 patient (20%) | 8 patient (22.8%) |
| Breast |
| 7 patient (20%) |
| Renal |
| 2 patient (5.71%) |