Neoplasm MicrometastasisLymph NodesLymphatic MetastasisKeratinsSentinel Lymph Node BiopsyImmunohistochemistryPrognosisBone Marrow NeoplasmsLymph Node ExcisionLymphNeoplasm StagingKeratin-20Frozen SectionsAxillaHematoxylinBreast NeoplasmsIncidenceNeoplasm MetastasisMammaglobin BStomach NeoplasmsKeratin-19Neoplasm InvasivenessReverse Transcriptase Polymerase Chain ReactionLung NeoplasmsNeoplastic Cells, CirculatingSensitivity and SpecificityTumor Markers, BiologicalAdenocarcinomaSurvival AnalysisCarcinomaRetrospective StudiesBile Duct NeoplasmsCarcinoembryonic AntigenColorectal NeoplasmsSurvival RateMice, NudeBone Marrow