Disk herniations (DH):
•Level
•Type: Diffuse Disk bulge / Focal Disk Bulge /
Focal Disk protrusion / Disk extrusion / Disk sequestration
•Location:
Axial: central – paracentral – foraminal – extra-foraminal
Sagittal: cranial and caudal extension à sequestrated Disk
•Nerve root compression
•Central canal stenosis