Arachnoid cyst - posterior fossa

Case contributed by Frank Gaillard
Diagnosis probable

Patient Data

Age: Young child

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

Large posterior fossa arachnoid cyst (note it follows CSF signal on both T1 and T2) with mass effect upon the cerebellum and brain stem compressing the 4th ventricle with subsequent obstructive supratentorial hydrocephalus. 

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