A<unk>  is a benign brain tumor. It originates from the arachnoid (not the dura), the tissue covering the brain and spinal cord lying deep to the dura.<unk> s are much more common in females, and are more common after 50 years of age. Of all cranial<unk> s, about 20% of them are in the<unk> <unk> . In some cases, deletions involving chromosome 22 are involved.
Sphenoid wing meningioma
Medulloblastoma
Pineoblastoma
Hemangioblastoma
Subependymoma
Choroid plexus papilloma
Sialoblastoma
Vestibular schwannoma