LiposarcomaLiposarcoma, MyxoidNeoplasms, Adipose TissueNeoplasms, Connective and Soft TissueRNA-Binding Protein FUSLipomaRetroperitoneal NeoplasmsSoft Tissue NeoplasmsHistiocytoma, Malignant FibrousTranscription Factor CHOPChromosomes, Human, Pair 12Histiocytoma, Benign FibrousSarcomaLeiomyosarcomaHeterogeneous-Nuclear RibonucleoproteinsOncogene Proteins, FusionProto-Oncogene Proteins c-mdm2CCAAT-Enhancer-Binding Proteins