- has a broader dome (B) than neck (A)
- extends above or below the disc level (into the suprapedicular or infrapedicular zone)
Extrusion can be in any axial direction and may migrate either superiorly or inferiorly. If the extrusion migrates but becomes separated from the rest of the herniation it is known as an intervertebral disc sequestration.
- 1. Fardon DF, Williams AL, Dohring EJ et-al. Lumbar disc nomenclature: version 2.0: Recommendations of the combined task forces of the North American Spine Society, the American Society of Spine Radiology and the American Society of Neuroradiology. Spine J. 2014;14 (11): . doi:10.1016/j.spinee.2014.04.022 - Pubmed citation
Synonyms & Alternative Spellings
|Synonyms or Alternative Spelling||Include in Listings?|
|Intervertebral disc extrusion||✗|
|Intervertebral disc extrusions||✗|