Spheroids, CellularTumor Cells, CulturedNeoplasms, ExperimentalCell AggregationCell Line, TumorModels, BiologicalCell SurvivalCell DivisionAntineoplastic AgentsMammary Neoplasms, ExperimentalTumor Markers, BiologicalTumor BurdenNeoplasmsCell ProliferationTumor Necrosis Factor-alphaGliomaNeoplasm TransplantationCell Culture TechniquesColonic NeoplasmsMice, NudeWilms TumorCell MovementBrain NeoplasmsGenes, Tumor SuppressorTumor Suppressor Protein p53Cell LineTumor MicroenvironmentTime FactorsCell HypoxiaApoptosisCarcinoid TumorNeoplasm MetastasisNeovascularization, PathologicTransplantation, HeterologousTumor Suppressor ProteinsNeuroendocrine TumorsNitrobenzoatesAdenocarcinoma