Presentation
Fits
Patient Data
Age: 15 years
Gender: Male
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Normal brain study.
A well-defined CSF-containing sac-like structure is seen protruding into left occipital dura with related scalloping of occipital bone with no diffusion restriction, suggestive of an arachnoid granulation.
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Arrows point to the arachnoid granulation.
Case Discussion
MRI features are suggestive of left-sided occipital arachnoid granulation, that penetrated the dura. It is an incidental finding and not related to patient's complaint.