Supratentorial NeoplasmsEpendymomaCraniotomyNeuroectodermal Tumors, PrimitiveCerebellar DiseasesInfratentorial NeoplasmsGlioma, SubependymalAstrocytomaCerebral HemorrhageBrain NeoplasmsCerebellar NeoplasmsBrain Stem NeoplasmsMagnetic Resonance ImagingGliomaNeurosurgical ProceduresCranial Fossa, PosteriorTomography, X-Ray ComputedMedulloblastomaGangliogliomaHematoma, Epidural, CranialPancreatic NeoplasmsHematomaIntracranial PressureCerebral VentriclesCerebral Ventricle NeoplasmsNeoplasmsArachnoidPrognosisMeningeal NeoplasmsMuscle HypertoniaTreatment OutcomeNeuroectodermal TumorsRetrospective StudiesNeuroendoscopyCerebral Ventriculography