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Primary brain injury:
epidural hematoma, SDH, subdural hygroma, DAI, cortical contusion
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Secondary brain injury:
cerebral herniation, diffuse cerebral edema, arterial dissection (spontaneous, trauma, HTN, vasculopathy, migraine, IVDA), CCF
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Extraaxial masses: hemisphere �
meningioma, mets, lymphoma, arachnoid cyst, dermoid/epidermoid, hemorrhagic or infectious fluid collections, hemangiopericytoma;
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Extraaxial masses: clivus/prepontine cistern �
meningioma, mets, chordoma, chondrosarcoma;
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Extraaxial masses: CPA mass �
acoustic neuroma, meningioma, mets, epidermoid, petrous apex cholesterol granuloma, paraganglioma, aneurysm, arachnoid cyst
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