Cystadenoma, PapillaryNeoplasms, Complex and MixedMyoepitheliomaSolitary Fibrous TumorsRadiography, AbdominalDendritic Cell Sarcoma, FollicularNeurilemmomaFatal OutcomePhyllodes TumorTomography, X-Ray ComputedPancreatic NeoplasmsImmunohistochemistryRetroperitoneal NeoplasmsTumor Markers, BiologicalMagnetic Resonance ImagingTreatment OutcomeNeoplasmsRetrospective StudiesNeoplasms, Cystic, Mucinous, and SerousPrognosisSkin NeoplasmsNeoplasms, Multiple PrimaryKidney NeoplasmsNeoplasms, Second PrimaryAdenocarcinoma, MucinousThyroid NeoplasmsMyeloproliferative DisordersDNA, NeoplasmLung NeoplasmsParotid NeoplasmsCystadenomaNeoplasms, Connective and Soft TissueNeoplasms, Plasma CellAppendiceal NeoplasmsLiver NeoplasmsCystadenoma, MucinousOvarian NeoplasmsEndocrine Gland NeoplasmsGastrointestinal NeoplasmsCarcinoma, Pancreatic DuctalNeoplasms, ExperimentalNeoplasms, Vascular TissueEye NeoplasmsNose NeoplasmsSalivary Gland NeoplasmsNeoplasms, Radiation-InducedAdenocarcinoma, PapillaryCarcinoma, PapillaryTesticular NeoplasmsNeoplasms, Muscle TissueNeoplasms, Glandular and EpithelialCystadenocarcinoma, MucinousAdenomaSoft Tissue NeoplasmsHematologic NeoplasmsNeoplasm ProteinsUterine NeoplasmsIntestinal NeoplasmsNeoplasms, Adnexal and Skin AppendageNeoplasm StagingVascular NeoplasmsSweat Gland NeoplasmsLymphomaBone NeoplasmsPalatal NeoplasmsAntigens, NeoplasmMandibular NeoplasmsCystadenocarcinomaBile Duct NeoplasmsNeoplasm InvasivenessThymus NeoplasmsSplenic NeoplasmsHeart NeoplasmsCystadenoma, SerousColonic NeoplasmsMaxillary NeoplasmsDog DiseasesAnal Gland NeoplasmsNeoplasms, Germ Cell and EmbryonalBone Marrow NeoplasmsNeoplasms, Adipose TissueColorectal NeoplasmsMeningeal NeoplasmsDuodenal NeoplasmsAdrenal Cortex NeoplasmsMouth NeoplasmsMediastinal NeoplasmsTongue NeoplasmsIleal NeoplasmsStomach NeoplasmsUrinary Bladder NeoplasmsCarcinoma, Acinar CellSpinal Cord NeoplasmsVaginal NeoplasmsAdenoma, OxyphilicNeoplasm Recurrence, LocalNervous System NeoplasmsJanus Kinase 2Neoplasm MetastasisMuscle Neoplasms