LiposarcomaLiposarcoma, MyxoidRNA-Binding Protein FUSRetroperitoneal NeoplasmsNeoplasms, Adipose TissueLipomaSoft Tissue NeoplasmsTranscription Factor CHOPMuscle NeoplasmsSpermatic CordSarcomaGenital Neoplasms, MaleChromosomes, Human, Pair 12MesocolonDioxolesCell DedifferentiationMediastinal NeoplasmsTomography, X-Ray ComputedLeiomyosarcomaTetrahydroisoquinolinesDelayed DiagnosisHistiocytoma, Malignant FibrousProto-Oncogene Proteins c-mdm2Histiocytoma, Benign FibrousPrenatal DiagnosisSensitivity and SpecificityOncogene Proteins, FusionEarly Diagnosis