Neoplasm MicrometastasisLymphatic MetastasisLymph NodesSentinel Lymph Node BiopsyBone Marrow NeoplasmsLymph Node ExcisionKeratinsLymphAxillaNeoplasm StagingBreast NeoplasmsNeoplasm MetastasisPrognosisImmunohistochemistryStomach NeoplasmsNeoplasm InvasivenessKeratin-20Lung NeoplasmsHematoxylinFrozen SectionsReverse Transcriptase Polymerase Chain ReactionNeoplastic Cells, CirculatingTumor Markers, BiologicalSensitivity and SpecificityMammaglobin BCarcinomaColorectal NeoplasmsCarcinoembryonic AntigenMice, NudeMelanomaAdenocarcinomaSurvival AnalysisPancreatic NeoplasmsSurvival RateLiver NeoplasmsNeoplasm Recurrence, Local