Anterior temporal pole perivascular cyst
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In the left anterior temporal pole is a subcortical cyst with associated high T2 signal in the surrounding white matter. A branch of the middle cerebral artery 'knuckles' into the cortex immediately adjacent to the cyst. Features are characteristic of an anterior temporal lobe perivascular cyst.
This is a very characteristic appearance and must not be mistaken for a more sinister pathology (e.g. cystic neoplasm).