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
