Table 1.
Herniated intervertebral disc |
Central |
Paramedian |
Foraminal |
Extraforaminal |
Migrated disc |
Lumbar spinal stenosis |
Lateral recess stenosis |
Central canal stenosis |
Ossification of ligamentum flavum |
Foraminal stenosis |
Infective spondylodiscitis |
Pyogenic discitis |
Epidural abscess |
Revision surgery |
Recurrent disc herniation |
Cage displacement |
Bone cement leakage into canal or foramen |
Spondylolisthesis (≤grade 2) |