"central: including paracentral (more precisely, right central or left central)"
"subarticular: including lateral recess (subarticular zone at the pedicular level)"
"foraminal: also known as lateral (non-standard)"
"extraforaminal: also known as lateral (non-standard) or far lateral"
"disc level: confined between the axial planes of the vertebral endplates"
"suprapedicular: between the superior pedicle margin and superior endplate of the caudad vertebral body"
"pedicular: at the level of the pedicle"
"infrapedicular: between the inferior pedicle margin and the inferior endplate of the craniad vertebral body"
"mild: less than 1/3 of the spinal canal or nerve root foramen diameter"
"moderate: between 1/3 and 2/3 of the spinal canal or nerve root foramen diameter"
"severe: greater than 2/3 of the spinal canal or nerve root foramen diameter"
"disc bulge: annular tissue projects beyond the margins of the adjacent vertebral bodies, involves >90° of circumference"
"protrusion: focal herniation of disc material beyond the margins of the adjacent vertebral body, involves"
Expected headings
"Disc"
"Localisation"
"Axial localisation"
"Sagittal localisation"
"Volume"
"The following terms relating to intervertebral discs are recognised 3. A brief description is included for some; each is then discussed in more detail in separate articles."