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Persistent embyronic ICA to vertebrobasilar connections:
trigeminal (#1), hypoglossal, otic, proatlantic artery
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Intraaxial hemorrhage:
HTN (#1), tumor, trauma, AVM, aneurysm, coagulopathy, amyloid angiopathy, emboli, hemorrhagic infarction, vasculitis, HTN encephalopathy (eclampsia, cyclosporine)
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Aneurysm: saccular �
degenerative, trauma, mycotic, vasculopathies;
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Aneurysm: fusiform �
atherosclerotic;
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Aneurysm: dissecting �
trauma > vasculopathy > spontaneous
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SAH:
aneurysm (#1), trauma, AVM, coagulopathy, extension of intraparenchymal bleed, idiopathic, spinal AVM
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Vascular malformations:
AVM, capillary telangiectasia, cavernous malformation, venous anomaly, vein of Galen AVM or varix
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Stroke:
atherosclerosis, cardiac emboli, arterial dissection, vasculopathy, IVDA, venous thrombosis, blood dyscrasias
-
Venous sinus thrombosis:
pregnancy, dehydration, infection, tumor, hypercoagulable state, trauma
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