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Mega cisterna magna

Case contributed by Frank Gaillard
Diagnosis certain

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

ct

Prominent retrocerebellar CSF space. 

mri

Large retrocerebellar space that follows CSF signal on all sequences. Normal cerebellar vermis. 

Case Discussion

Incidental mega cisterna magna. Images at higher levels confimed the presence of a normal posterior fossa and vermis distinguishing it from a Dandy-Walker malformation.

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