Neoplasm MicrometastasisLymphatic MetastasisLymph NodesSentinel Lymph Node BiopsyBone Marrow NeoplasmsLymph Node ExcisionLymphKeratinsAxillaNeoplasm StagingNeoplasm MetastasisBreast NeoplasmsImmunohistochemistryPrognosisKeratin-20HematoxylinFrozen SectionsMammaglobin BNeoplastic Cells, CirculatingStomach NeoplasmsNeoplasm InvasivenessLung NeoplasmsSensitivity and SpecificityReverse Transcriptase Polymerase Chain ReactionTumor Markers, BiologicalCarcinoembryonic AntigenCarcinomaMelanomaColorectal NeoplasmsAdenocarcinomaKeratin-19Liver NeoplasmsSkin NeoplasmsSurvival AnalysisNeoplasm Recurrence, LocalMice, NudeBone MarrowSurvival RatePredictive Value of TestsNeoplasm TransplantationRetrospective StudiesPancreatic Neoplasms