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Unfused paracondylar process

Case contributed by Craig Hacking
Diagnosis certain


Trauma patient. Intubated.

Patient Data

Age: 30 years
Gender: Male

Alignment is normal. No fracture or facet joint widening. Disc spaces are preserved. No prevertebral soft tissue swelling.

Incidental accessory bone articulating with the occipital bone lateral to the right occipital condyle and the adjacent right transverse process of the atlas (an unfused paracondylar process).

ETT noted.

Case Discussion

Nice example of a rare congenital variant of the occipital bone.

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