Diagnosis: Vertebrobasilar thrombosis
Occlusion of the vertebrobasilar system may be due to atherosclerotic disease, embolus, dissection, coagulopathy, and web (stricture). Infarctions may occur in any of the branches of the vertebrobasilar system depending on the age of the lesion, the degree of stenosis and the amount of collateral flow from the anterior circulation. In this case, flow to the PCAs was no longer seen by the time the angiogram was performed. Even though the vertebrobasilar system looks completely occluded on the MR/MRA, there is still a bit of flow on the angiogram feeding the AICAs. Related Cases
