Neoplasm MicrometastasisLymphatic MetastasisLymph NodesSentinel Lymph Node BiopsyBone Marrow NeoplasmsLymph Node ExcisionKeratinsLymphAxillaNeoplasm StagingNeoplasm MetastasisBreast NeoplasmsImmunohistochemistryKeratin-20PrognosisHematoxylinFrozen SectionsMammaglobin BNeoplastic Cells, CirculatingStomach NeoplasmsNeoplasm InvasivenessLung NeoplasmsReverse Transcriptase Polymerase Chain ReactionSensitivity and SpecificityTumor Markers, BiologicalCarcinoembryonic AntigenCarcinomaMelanomaKeratin-19Colorectal NeoplasmsAdenocarcinomaLiver NeoplasmsSkin NeoplasmsSurvival AnalysisNeoplasm Recurrence, LocalMice, NudeBone MarrowSurvival RatePredictive Value of TestsNeoplasm TransplantationRetrospective StudiesPancreatic Neoplasms