Basilar invagination and platybasia

Case contributed by Dr Hidayatullah Hamidi


Abnormal gait.

Patient Data

Age: 10 years
Gender: Male

Tip of the odontoid is above the level of the foramen magnum (basilar invagination) resulting in significant narrowing of the canal and compression over the cord at this level.

Abnormal flattening of the skull bases is seen (platybasia).

No significant obstruction (no hydrocephalus or syrinx formation) noted.

No tonsillar herniation to suggest Chiari malformation (group I).

Case Discussion

Basilar invagination is a craniocervical junction abnormality where the tip of the odontoid process projects above the foramen magnum.

Basilar invagination is often associated with platybasia as in this case. 

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Case information

rID: 55142
Published: 7th Oct 2017
Last edited: 14th Aug 2019
System: Head & Neck
Inclusion in quiz mode: Included
Institution: French Medical Institute for Mothers and Children

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