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Choroidal fissure cyst

Case contributed by Ammar Haouimi
Diagnosis almost certain

Presentation

Headaches. Incidental finding.

Patient Data

Age: 16 years
Gender: Female
mri

Well-defined ovoid cystic lesion (25 mm) of the right choroidal fissure of CSF signal on all sequences with no restricted diffusion or enhancement on postcontrast sequence. A mass effect is noted on the hippocampus with mild dilatation of the adjacent temporal horn.

Case Discussion

MRI feature of a choroidal fissure cyst (incidental finding).

On imaging, the main differential diagnoses include:

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