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Review Question - QID 211707

Occipitocervical Instability Complications Bleeding QID: 211707 (SBQ18SP.55)
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QID 211707 (Type "211707" in App Search)
A 43-year-old female undergoes posterior occipitocervical fusion due to significant instability secondary to Rheumatoid Arthritis. During placement of screws in C1 the drill penetrates through the anterior cortex, which places what structure at the greatest risk of injury?
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