Basilar invagination

Case contributed by Yaïr Glick
Diagnosis certain

Presentation

Head trauma - rule out intracranial bleed.

Patient Data

Age: 95 years
Gender: Female
ct
This study is a stack
Axial bone
window
This study is a stack
Axial soft
tissue
This study is a stack
Coronal
bone window
This study is a stack
Coronal
soft tissue
This study is a stack
Sagittal
bone window
This study is a stack
Sagittal
soft tissue
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Info

Left parietal scalp haematoma with tiny locules of air.

No intracranial haemorrhage (not shown) or skull fracture.

Incidental calcified right tentorial meningioma.

Basilar invagination and extensive dens erosion are both probably due to rheumatoid arthritis.

Mild anterolisthesis of C3 on C4 and of C4 on C5. Inversion of cervical lordosis around C5.

Kissing carotids. Exuberantly calcified atheromatous plaque around carotid bifurcations.

Calcified spinal meningioma at T2-T3 level, left anterior aspect.

Case Discussion

Incidental basilar invagination on a CT trauma head-neck, probably acquired due to rheumatoid arthritis, which can also explain the extensive erosion along the odontoid peg.

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