Unfused anterior and posterior arches of C1

Case contributed by Andrew Murphy
Diagnosis certain

Presentation

Cervical spine pain post motor vehicle accident

Patient Data

Age: 55 years
Gender: Female

Normal variant with congenital non-fusion of both the anterior and posterior ring of C1

Case Discussion

It is a good habit to familiarise yourself with congenital abnormalities that mimic fractures. Although memorizing every single one is not ideal, it is ideal to note the information is readily accessible and should be acknowledged. This particular congenital defect is rare and to the untrained eye may mimic the appearance of an unstable fracture.

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