Patient Demographics (605 cases, 1991-2000).
| Mean Age | 47 years (range 17-88) |
| Sex | M 56% W 44% |
| Duration of Symptoms | 10 months (range 1 - 120) |
| Radicular pain | Right (51%); left (49%) |
| Investigation | Myelogram 42 patients; CT Scan 206 patients; MRI 357 patients |