Presentation
Headaches. Incidental finding.
Patient Data
Age: 16 years
Gender: Female
From the case:
Choroidal fissure cyst
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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:
- solitary enlarged perivascular space (if intra-axial location)
- hippocampal sulcus remnant cysts