Possible small arachnoid cyst

Case contributed by Saleh Saleh
Diagnosis possible

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

An expansionary change with some high density, lying between the skull and brain, possibly eroding the bone.

Case Discussion

The change shows no contrast enhancement after CECT.

What is the most likely diagnosis?

Arachnoidal cyst. The initial high density is due to partial voluming of the skull.

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