Neoplasm MicrometastasisLymph NodesLymphatic MetastasisKeratinsSentinel Lymph Node BiopsyImmunohistochemistryPrognosisBone Marrow NeoplasmsLymph Node ExcisionLymphNeoplasm StagingKeratin-20Frozen SectionsAxillaHematoxylinBreast NeoplasmsNeoplasm MetastasisMammaglobin BKeratin-19Stomach NeoplasmsNeoplasm InvasivenessReverse Transcriptase Polymerase Chain ReactionNeoplastic Cells, CirculatingLung NeoplasmsSensitivity and SpecificityTumor Markers, BiologicalAdenocarcinomaCarcinomaSurvival AnalysisBile Duct NeoplasmsCarcinoembryonic AntigenMice, NudeBone Marrow