Neoplasm MicrometastasisKeratinsBone Marrow NeoplasmsSentinel Lymph Node BiopsyLymphatic MetastasisKeratin-20Lymph NodesSensitivity and SpecificityImmunohistochemistryNeoplasm MetastasisBreast NeoplasmsNeoplasm StagingKeratin-19AxillaHematoxylinNeoplastic Cells, CirculatingFrozen SectionsTumor Markers, BiologicalPrognosisMammaglobin BKeratin-7Reverse Transcriptase Polymerase Chain ReactionCarcinoembryonic AntigenLung NeoplasmsLymph Node ExcisionStomach NeoplasmsNeoplasm InvasivenessKeratin-18Limit of DetectionCarcinomaLiver NeoplasmsColorectal NeoplasmsPolymerase Chain ReactionImmunoenzyme TechniquesAdenocarcinomaPredictive Value of TestsMelanomaMice, NudeBone MarrowAntibodies, MonoclonalRNA, MessengerNeoplasm TransplantationNeoplasm Recurrence, LocalPancreatic NeoplasmsSkin NeoplasmsNeoplasmsRetrospective StudiesSurvival AnalysisMicrotomyReproducibility of Results