Tumor Markers, BiologicalTumor BurdenTumor Necrosis Factor-alphaCell Line, TumorLeiomyosarcomaCarcinoid TumorHemangiopericytomaTomography, X-Ray ComputedLipomaParagangliomaRare DiseasesWilms TumorChordomaBrain NeoplasmsCarcinosarcomaGangliogliomaNeoplasms, ExperimentalGenes, Tumor SuppressorNeuroectodermal TumorsSolitary Fibrous TumorsRetroperitoneal NeoplasmsHemangiosarcomaNeoplasms, Complex and MixedTumor Suppressor Protein p53NeurilemmomaMixed Tumor, MalignantFatal OutcomeNeoplasms, Multiple PrimaryImmunohistochemistryVascular NeoplasmsNeuroendocrine TumorsKidney NeoplasmsMesenchymomaTumor Suppressor ProteinsSarcomaParanasal Sinus NeoplasmsEar NeoplasmsNose NeoplasmsTumor MicroenvironmentNeoplasm MetastasisHamartomaLiver NeoplasmsPancreatic NeoplasmsAdenocarcinomaMagnetic Resonance ImagingTreatment OutcomeMammary Neoplasms, ExperimentalSpinal Cord NeoplasmsNeuroectodermal Tumors, PrimitiveChondroblastomaGlioma, SubependymalFibrosarcomaParotid NeoplasmsSoft Tissue NeoplasmsAdrenocortical CarcinomaAdenoma, VillousNeovascularization, PathologicPhyllodes TumorGiant Cell TumorsGenital Neoplasms, MaleCombined Modality TherapyEsthesioneuroblastoma, OlfactoryBone NeoplasmsChondrosarcoma, MesenchymalCarcinoma, NeuroendocrineNeoplasm StagingNeoplasm Recurrence, LocalSkull NeoplasmsSweat Gland NeoplasmsTransplantation, HeterologousFibromaSkin NeoplasmsGastrointestinal Stromal TumorsHemangioendothelioma, EpithelioidAdrenal Cortex NeoplasmsXenograft Model Antitumor AssaysCell ProliferationHistiocytoma, Benign FibrousMice, Inbred BALB CDuodenal NeoplasmsDermoid CystAntigens, NeoplasmRetrospective StudiesHeart NeoplasmsLiposarcomaOsteoblastomaBiopsyNeoplasmsSubmandibular Gland NeoplasmsNeoplasm ProteinsColonic NeoplasmsSkull Base NeoplasmsSalivary Gland NeoplasmsCell DivisionCarcinoma, Ehrlich TumorCystadenocarcinoma, MucinousTeratomaNeoplasms, Muscle TissueEpistaxisCerebellar Neoplasms