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Basilar invagination

Case contributed by Paresh K Desai
Diagnosis probable

Presentation

Head injury 3 days prior

Patient Data

Age: 75 years
Gender: Male

Note: This case has been tagged as "legacy" as it no longer meets image preparation and/or other case publication guidelines.

mri

Tip of the odontoid is 5 mm above the level of foramen magnum (MacRae's line). The pro-atlas is seen to articulate with inferior margin of clivus with large osteophytes at this neo-articulation.

The transverse ligament is thickened and is indenting the brainstem. No abnormal signal intensity in the brainstem.

Case Discussion

Incidental detection of basilar invagination.

Patient incidentally had "Kissing carotids"

Final diagnosis: Basilar invagination

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