Neoplasm MicrometastasisLymph NodesLymphatic MetastasisKeratinsSentinel Lymph Node BiopsyImmunohistochemistryPrognosisBone Marrow NeoplasmsLymph Node ExcisionLymphNeoplasm StagingKeratin-20Frozen SectionsAxillaHematoxylinBreast NeoplasmsNeoplasm MetastasisKeratin-19Mammaglobin BStomach NeoplasmsSensitivity and SpecificityNeoplasm InvasivenessReverse Transcriptase Polymerase Chain ReactionLung NeoplasmsTumor Markers, BiologicalNeoplastic Cells, CirculatingAdenocarcinomaCarcinomaRetrospective StudiesSurvival AnalysisBile Duct NeoplasmsCarcinoembryonic AntigenPredictive Value of TestsBone MarrowColorectal NeoplasmsMice, NudeSurvival RateMelanoma