Prominent perivascular space

Case contributed by Dr Mohamed Mahmoud Elthokapy

Presentation

Incidental finding.

Patient Data

Age: 40 years
Gender: Female

Non-contrast CT of the brain demonstrates a small fluid density lesion near the right choroidal fissure without mass effect.

Annotated image

A small cystic lesion of CSF density is seen near to the choroidal fissure with a characteristic spindle or ovoid shape paralleling the long axis of the temporal lobe and choroid fissure on the sagittal images (blue arrow) measuring about 12 x 13 x 12 mm at AP, TV, and CC dimensions respectively.

Case Discussion

This case demonstrates an enlarged perivascular space mimicking a choroidal fissure cyst, both diagnoses are equally considered. It is a benign intracranial cyst, usually asymptomatic. No follow-up or any treatment is needed.

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