NeuroblastomaCell Line, TumorGanglioneuromaTumor Cells, CulturedOncogene Proteins3-IodobenzylguanidineGenes, mycGanglioneuroblastomaVanilmandelic AcidEsthesioneuroblastoma, OlfactoryGene AmplificationAbdominal NeoplasmsNervous System NeoplasmsGangliosidesApoptosisGene Expression Regulation, NeoplasticBone Marrow NeoplasmsAdrenal Gland NeoplasmsTretinoinCell DifferentiationNeuronsIodobenzenesCell LineHybrid CellsCell SurvivalProto-Oncogene Proteins c-mycNuclear ProteinsNeuroectodermal Tumors, Primitive, PeripheralAntineoplastic AgentsChromosomes, Human, Pair 1NeuritesRNA, MessengerTransfectionMice, NudeCell ProliferationBrain NeoplasmsNeoplasm StagingFenretinideReverse Transcriptase Polymerase Chain ReactionBlotting, WesternHomovanillic AcidPrognosisIsotretinoin