Merkel CellsCarcinoma, Merkel CellMerkel cell polyomavirusPolyomavirus InfectionsCarcinomaNeoplasm MetastasisSkin NeoplasmsPolyomavirusLymphatic MetastasisCarcinoma, Squamous CellCarcinoma, HepatocellularKeratin-20Tumor Virus InfectionsLiver NeoplasmsImmunohistochemistryLung NeoplasmsNeoplasm InvasivenessTumor Markers, BiologicalCell Line, TumorCarcinoma in SituAntigens, Viral, TumorPrognosisCarcinoma, PapillaryNeoplasm StagingCarcinoma, Basal CellVibrissaeBreast NeoplasmsAdenocarcinomaFacial NeoplasmsCarcinoma, Ductal, BreastGene Expression Regulation, NeoplasticMechanoreceptorsSkinLingual FrenumAntigens, Polyomavirus TransformingNeoplasm Recurrence, LocalDNA NucleotidylexotransferaseImmunoenzyme TechniquesMelanomaMice, NudeSurvival RateNeoplasm TransplantationThyroid NeoplasmsQuinacrineDNA, ViralTumor Cells, CulturedApudomaLymph NodesCarcinoma, Transitional CellFatal OutcomeColorectal NeoplasmsNeoplasm ProteinsCarcinoma, Adenoid CysticSmall Cell Lung CarcinomaCarcinoma, Small CellKeratin-8Carcinoma, BronchogenicCarcinoma, LobularAntineoplastic AgentsStomach NeoplasmsCarcinoma, Intraductal, NoninfiltratingCarcinoma, MedullaryRetrospective StudiesColonic NeoplasmsNasopharyngeal NeoplasmsCombined Modality TherapyEnkephalin, MethionineReverse Transcriptase Polymerase Chain ReactionCell ProliferationLip NeoplasmsSynaptophysinEyelid NeoplasmsTreatment OutcomeTissue Array AnalysisKaplan-Meier EstimateCarcinoma, NeuroendocrineNerve EndingsSurvival AnalysisDisease-Free SurvivalEsophageal NeoplasmsCheekHead and Neck NeoplasmsDisease ProgressionNeuroendocrine Secretory Protein 7B2Time FactorsBlood Buffy CoatKeratinsCell MovementEpidermisMouth NeoplasmsFollow-Up StudiesNeovascularization, PathologicMice, SCIDHair FollicleOvarian NeoplasmsTomography, X-Ray ComputedBrain NeoplasmsCarcinoma, AdenosquamousPancreatic NeoplasmsCarcinoma, Mucoepidermoid