Patient Data
Age: Young adult
From the case:
Arachnoid cyst - middle cranial fossa
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A region of CSF intensity which expands the middle cranial fossa and displaces the temporal lobe posteriorly. There is no restricted diffusion, no solid component and no enhancement. Features are characteristic of an arachnoid cyst.
Case Discussion
This arachnoid cyst would fall into the type 2 Galassi classification (not that anyone uses it in practice).