Desmoplastic Small Round Cell TumorAbdominal NeoplasmsSarcoma, Small CellSarcoma, EwingRNA-Binding Protein EWSNeuroectodermal Tumors, PrimitiveRhabdomyosarcoma, EmbryonalWT1 ProteinsChimerin ProteinsCarcinoma, Small CellPeritoneal NeoplasmsOncogene Proteins, FusionRhabdomyosarcoma, AlveolarRhabdomyosarcomaHeterogeneous-Nuclear RibonucleoproteinsNeuroectodermal Tumors, Primitive, PeripheralFibroma, DesmoplasticChromosomes, Human, Pair 22Proto-Oncogene Protein c-fli-1Translocation, GeneticReverse Transcriptase Polymerase Chain ReactionSarcoma, Clear CellLiposarcoma, MyxoidImmunohistochemistryBone NeoplasmsGranulosa Cell TumorChromosomes, Human, Pair 11Venereal Tumors, VeterinaryGiant Cell Tumor of BoneTumor Markers, BiologicalGiant Cell TumorsHistiocytoma, Benign FibrousMastocytomaHistiocytic SarcomaEncyclopedias as TopicDiagnostic ErrorsSarcoma