Fact-sheet: Choroidal fissure cyst
Updated on 03/25/2020 at 11:39 AM
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Definition
Extra-axial cystic formation located on the medial aspect of the temporal lobe, developing within the choroidal fissure.
Clinical features
Often asymptomatic.
May be a cause of temporal lobe epilepsy.
CT
Well-circumscribed, hypodense formation located in the medial temporal lobe, which may exert mass effect on the hippocampus.
MRI
FLAIR: signal suppression of the rounded formation located in the medial temporal lobe.
Gadolinium: no contrast enhancement.
Differential diagnosis
Arachnoid cyst - intracranial