CT Myelography in Cervical Nerve Root Avulsion

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Abstract
Computed tomographic myelography (CTM) with metrizamide was performed in 6 patients to delineate the CTM appearance of avulsed cervical nerve roots; 1/2 cervical nerve root avulsions were found and confirmed by cervical myelography and physical examination. The CTM findings in cervical nerve root avulsion closely matched those found myelographically: outpouchings of metrizimde extending ventrolaterally from the thecal sac into the neural foramen in an expanding or mushroom-like manner and separated from the thecal sac proximally by a 1-2 mm thick dural plane. This CTM appearance differs from that seen in such normal variants as dilated nerve root sleeves or root deverticula. CTM is as sensitive as myelography. In addition, it can provide useful information regarding bony fragments or contiguous soft tissue injury.

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