Brain Stem NeoplasmsBrain StemBrain NeoplasmsGliomaGlioblastomaBrain ChemistryStem CellsBrain InjuriesAstrocytomaBrainMeningiomaMeningeal NeoplasmsBrain MappingMagnetic Resonance ImagingCentral Nervous System Parasitic InfectionsOligodendrogliomaNeoplastic Stem CellsNeuronsBrain EdemaMedulloblastomaBlood-Brain BarrierBrain IschemiaImmunohistochemistryEvoked Potentials, Auditory, Brain StemBrain Stem InfarctionsPlant StemsBrevicanHematopoietic Stem CellsStem Cell TransplantationTime FactorsAstrocytesElectromagnetic RadiationBrain AbscessEpendymomaNeurilemmomaPancreatic NeoplasmsAdult Stem CellsNeoplasmsCell Line, TumorDisease Models, AnimalCerebral CortexNeoplasm InvasivenessAntineoplastic Agents, AlkylatingCell ProliferationCells, CulturedDacarbazine