Choroidal fissure cyst

Case contributed by Dr Ammar Haouimi

Presentation

Headaches.

Patient Data

Age: 10 years
Gender: Male
MRI

There is a well-defined cystic lesion within the right choroidal fissure of homogeneous CSF signal on all sequences with no calcification seen.

Case Discussion

MRI feature of a choroidal fissure cyst (incidental finding). There are signs confirming extra-axial location as splaying of the right posterior cerebral artery and indentation of the right mesial temporal lobe.

The main differential diagnosis is a solitary enlarged perivascular space (if intra-axial location).

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