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Radioulnar Synostosis
Joseph Junewick, MD FACR
over 11 years ago
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Congenital C2 Spondylolysis

Case Detail

Anatomy: Brain-Spine
Joseph Junewick, MD FACR
Diagnostic Category: Developmental or Congenital
Created: over 9 years ago
Updated: over 9 years ago
Tags: PEDS
Modality/Study Types: CR
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16 month old male with minor injury and no neurologic deficit.

Case Images


Congenital C2 Spondylolysis


CR – Cross-table lateral radiograph demonstrates lucent defect in the pars interarticularis of C2 with sclerotic margins and normal alignment.


Congenital spondylolysis of the cervical spine is very rare. The embryologic basis is related to lack of development of the pars interarticularis chondrification center. This results in enlargement of the neural foramen and dysplastia of the artricular pillar, lamina and transverse process.


Currarino G. Primary spondylolysis of the axis vertebra (C2) in 3 children, including one with pyknodysostosis. Pediatr Radiol (1989); 19:535-538.

Konez O, Goyal M, Ciaverella DP. Bilateral absence of the pars interarticularis of C2: Developmental or post-traumatic abnormality. Emerg Radiol (2001); 8:48-50.

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