Merkel CellsCarcinoma, Merkel CellMerkel cell polyomavirusPolyomavirus InfectionsSkin NeoplasmsPolyomavirusKeratin-20Tumor Virus InfectionsCarcinomaCarcinoma, Squamous CellAntigens, Viral, TumorVibrissaeCarcinoma, HepatocellularMechanoreceptorsLingual FrenumSkinFacial NeoplasmsDNA NucleotidylexotransferaseImmunohistochemistryAntigens, Polyomavirus TransformingQuinacrineApudomaCarcinoma, Basal CellDNA, ViralTumor Markers, BiologicalEnkephalin, MethionineKeratin-8Carcinoma in SituNerve EndingsSmall Cell Lung CarcinomaSynaptophysinNeuroendocrine Secretory Protein 7B2Blood Buffy CoatImmunoenzyme TechniquesCarcinoma, PapillaryLip NeoplasmsCheekEpidermisHair FolliclePrognosisEyelid NeoplasmsNeoplasm StagingTouchViral TropismLiver Neoplasms