Neoplasm MicrometastasisBone Marrow NeoplasmsSentinel Lymph Node BiopsyLymphatic MetastasisKeratinsLymph NodesNeoplasm MetastasisAxillaNeoplasm StagingKeratin-20HematoxylinBreast NeoplasmsFrozen SectionsMammaglobin BImmunohistochemistryNeoplastic Cells, CirculatingPrognosisLung NeoplasmsLymph Node ExcisionReverse Transcriptase Polymerase Chain ReactionCarcinoembryonic AntigenStomach NeoplasmsNeoplasm InvasivenessSensitivity and SpecificityTumor Markers, BiologicalColorectal NeoplasmsLiver NeoplasmsKeratin-19CarcinomaMice, NudeMelanomaBone MarrowNeoplasm TransplantationNeoplasm Recurrence, LocalAdenocarcinomaPancreatic NeoplasmsSurvival Analysis