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Choroidal fissure cyst

Case contributed by Ammar Haouimi
Diagnosis almost certain


Incidental finding.

Patient Data

Age: 20 years
Gender: Female

There is a small well-defined ovoid cystic lesion of the left choroidal fissure with a mass effect on the hippocampus, measuring 20 x 13 x 20 mm, of homogeneous CSF signal on all sequences.

Case Discussion

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

On imaging, the main differential diagnoses include:

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