Vestibular schwannoma 75%
Meningioma 10%
Epidermoid 5%
Facial nerve schwannoma 4%
Aneurysm (vertebral,basilar,PICA)
Brain stem glioma
Arachnoid cyst
Paraganglioma
Hematogenous metastatis
Subarachnoid spread of tumors
Lipoma
Hemangioma
Choroid plexus papilloma
Ependymoma
Desmoplastic medulloblastoma
Ref :Yousem and Grossman Neuroradiology
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