Mast-Cell SarcomaSarcoma, Clear CellMast CellsLangerhans Cell SarcomaSarcomaDendritic Cell Sarcoma, FollicularSarcoma, Small CellDendritic Cell Sarcoma, InterdigitatingSarcoma, SynovialLeukoencephalopathy, Progressive MultifocalHistiocytic SarcomaSoft Tissue NeoplasmsSarcoma, EwingSarcoma, KaposiSarcoma, ExperimentalAvian Sarcoma VirusesCell DegranulationSarcoma 180Histamine ReleaseDendritic Cells, FollicularOncogene Proteins, FusionNephroma, MesoblasticLymphoma, Non-HodgkinTryptasesJC VirusChymasesReceptors, IgESarcoma Viruses, Murinep-Methoxy-N-methylphenethylamineLeiomyosarcomaRNA-Binding Protein EWSLymphoma, Large B-Cell, DiffusePeripheral Nervous System NeoplasmsImmunohistochemistryCell TransdifferentiationImmunoglobulin ESarcoma, AvianMastocytosisFatal OutcomeKidney NeoplasmsMicrophthalmia-Associated Transcription FactorV(D)J RecombinationWilms TumorSplenic NeoplasmsEye NeoplasmsSarcoma, MyeloidProto-Oncogene Proteins c-kitSarcoma, Endometrial StromalCromolyn SodiumElectroretinographyLaser Capture MicrodissectionMastocytosis, SystemicTranslocation, GeneticHistamine