Neoplasm MicrometastasisBreastBone Marrow NeoplasmsSentinel Lymph Node BiopsyLymphatic MetastasisKeratinsLymph NodesCarcinoma, Ductal, BreastNeoplasm StagingKeratin-20Breast DiseasesFrozen SectionsNeoplasm MetastasisImmunohistochemistryHematoxylinPrognosisNeoplasm InvasivenessMammaglobin BKeratin-19Tumor Markers, BiologicalReverse Transcriptase Polymerase Chain ReactionAxillaStomach NeoplasmsBreast NeoplasmsLung NeoplasmsNeoplastic Cells, CirculatingBreast FeedingCarcinomaSensitivity and SpecificityLymph Node ExcisionNeoplasmsSurvival Analysis