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An adult undergoes cervical CT after a minor road traffic collision. A gap is identified in the posterior arch of C1. Which CT finding most strongly favors a congenital posterior arch defect rather than an acute fracture?

singleBestAnswer

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1

Comminution adjacent to the arch gap

2

Adjacent soft-tissue swelling

3

Sharp, noncorticated margins at the gap

4

Smooth, well-corticated margins at the gap

5

A gap visible on multiple reconstructed planes

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abnormality of spinal alignment.png

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