Presentation
Incidental finding.
Note: This case has been tagged as "legacy" as it no longer meets image preparation and/or other case publication guidelines.
From the case:
Partially thrombosed MCA aneurysm
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Partially thrombosed left MCA berry aneurysm seen as a heterogenous rounded structure with blood products resulting in signal drop out on gradient echo imaging.
Time of flight MRA demonstrates only the non-thrombosed part of the aneurysm.