Neoplasm MicrometastasisAntineoplastic Combined Chemotherapy ProtocolsBone Marrow NeoplasmsLymphatic MetastasisSentinel Lymph Node BiopsyChemotherapy, AdjuvantKeratinsLymph NodesNeoplasm StagingBreast NeoplasmsPrognosisLung NeoplasmsNeoplasm MetastasisKeratin-20Frozen SectionsTreatment OutcomeHematoxylinSurvival AnalysisCombined Modality TherapyStomach NeoplasmsImmunohistochemistryAntineoplastic AgentsCisplatinMammaglobin BKeratin-19NeoplasmsDisease-Free SurvivalSurvival RateCyclophosphamideDoxorubicinTumor Markers, BiologicalNeoplasm Recurrence, LocalNeoplasm InvasivenessReverse Transcriptase Polymerase Chain ReactionAdenocarcinomaNeoplastic Cells, CirculatingPancreatic NeoplasmsColorectal NeoplasmsLiver NeoplasmsAxillaCarcinomaLymph Node ExcisionFollow-Up StudiesNeoadjuvant TherapySensitivity and SpecificityBile Duct Neoplasms