TOPICS: Metastatic, lung, breast, primary, supratentorial, infratentorial, glioblastoma multiforme, astrocytes, cerebral hemisphere, butterfly lesion, pseudopalisading, meningioma, arachnoid cells, seizures, psammoma bodies, whorled pattern, schwannoma, CN VIII, cerebellopontine angle, hearing loss, tinnitus, S-100, neurofibromatosis type 2, oligodendroglioma, fried egg cells, calcified tumor, pilocytic astrocytoma, GFAP positive, Rosenthal fibres, medulloblastoma, granular cells, synaptophysin, Homer Wright rosettes, cauda equina, drop metastasis, ependymoma, 4th ventricle, hydrocephalus, periventricular pseudorosettes, craniopharyngioma, Rathke's pouch, ectoderm, optic chiasm, bitemporal hemianopsia