zervikale Pseudosubluxation
![](https://pacs.de/sites/default/files/pictures/thumbs/data.pacs.de/1/0/1/6/7/8/pseudosubluxationcervicalspine01mdcervicalpainc2onc3flexexten3yo_thumb.jpg)
Preschooler
with cervical pain. Lateral radiographs of the cervical spine in flexion (left) show anterior subluxation of the C2 vertebral body on the C3 vertebral body which reduces on extension (right) and is now in normal alignment.The diagnosis was pseudosubluxation of the cervical spine.
![](https://pacs.de/sites/default/files/pictures/thumbs/data.pacs.de/1/1/6/2/8/5/6cfff56e43107d6035a6d7b40b2e92_big_gallery_thumb.jpg)
Pseudosubluxation
of the cervical spine • Pseudosubluxation of C2/3 - Ganzer Fall bei Radiopaedia
![](https://pacs.de/sites/default/files/pictures/thumbs/data.pacs.de/1/1/6/2/8/6/d7ec2c11e001f172d5fe00a2bb377b_big_gallery_thumb.jpg)
Pseudosubluxation
of the cervical spine • Cervical pseudosubluxation - Ganzer Fall bei Radiopaedia
![](https://pacs.de/sites/default/files/pictures/thumbs/data.pacs.de/1/1/6/2/8/7/35ddf41c0b1c0bf6eb9ee9985eaa9f_big_gallery_thumb.jpg)
Pseudosubluxation
of the cervical spine • Pseudosubluxation - Ganzer Fall bei Radiopaedia
![](https://pacs.de/sites/default/files/pictures/thumbs/data.pacs.de/1/1/6/2/8/8/d41ac20b0a0978153b75e71d2ac63e_big_gallery_thumb.jpg)
Pseudosubluxation
of the cervical spine • Cervical pseudosubluxation - Ganzer Fall bei Radiopaedia
Pseudosubluxation of the cervical spine is the physiological anterior displacement of C2 on C3 in children. It is common in children <7 years, and less often present in older children. Less often it is seen at C3 on C4. It is more pronounced in flexion and is of clinical significance as it can be confused with traumatic cervical injury .
Pathology
Immature lax ligaments are considered the cause of this appearance.
Radiographic features
Pseudosubluxation is based on a normal relationship of the upper cervical spine using Swischuk's line and the absence of prevertebral soft tissue swelling.
Swischuk's line is drawn from anterior aspect of posterior arch of C1 to anterior aspect of posterior arch of C3 .
- the anterior aspect of posterior arch of C2 should be within 1-2 mm of this line:
- if deviated less than 2 mm: it is consistent with pseudosubluxation, but this alone is insufficient to rule out a hangman fracture
- if deviated more than 2 mm: it is indicative of true subluxation
Siehe auch:
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