Pseudo-Jefferson fracture

Last revised by Yuranga Weerakkody on 29 Oct 2020

Citation, DOI, disclosures and article data

Citation:

Fortin F, Weerakkody Y, Murphy A, et al. Pseudo-Jefferson fracture. Reference article, Radiopaedia.org (Accessed on 19 Apr 2024) https://doi.org/10.53347/rID-71004

DOI:

https://doi.org/10.53347/rID-71004

Permalink:

https://radiopaedia.org/articles/71004

rID:

71004

Article created:

13 Sep 2019, Francis Fortin

Disclosures:

At the time the article was created Francis Fortin had no recorded disclosures.

View Francis Fortin's current disclosures

Last revised:

29 Oct 2020, Yuranga Weerakkody ◉

Disclosures:

At the time the article was last revised Yuranga Weerakkody had no recorded disclosures.

View Yuranga Weerakkody's current disclosures

Revisions:

6 times, by 6 contributors - see full revision history and disclosures

Systems:

Musculoskeletal, Paediatrics

Sections:

Anatomy

Tags:

stub

Synonyms:

Pseudospread of the atlas on the axis

A pseudo-Jefferson fracture, or pseudospread of the atlas on the axis, refers to the normal overhanging of the lateral edges of the lateral masses of C1 over the lateral edges of the body of C2 seen in children. Most often, children will display this physiologically until about 7 years of age which is thought to be due to differential speed of growth of the atlas and axis. An accepted maximal value of normal overhanging is 6 mm when adding the offset of both the left and right sides ^1,2.

It should not be mistaken for a Jefferson fracture.