RT Journal Article SR Electronic T1 Circulating Tumor Cells With Epithelial–to–mesenchymal Transition Phenotypes Associated With Inferior Outcomes in Primary Breast Cancer JF Anticancer Research JO Anticancer Res FD International Institute of Anticancer Research SP 1829 OP 1837 DO 10.21873/anticanres.13290 VO 39 IS 4 A1 MICHAL MEGO A1 MARIAN KARABA A1 GABRIEL MINARIK A1 JURAJ BENCA A1 JURISOVA SILVIA A1 TATIANA SEDLACKOVA A1 DENISA MANASOVA A1 KATARINA KALAVSKA A1 DANIEL PINDAK A1 MASSIMO CRISTOFANILLI A1 JAMES M. REUBEN A1 JOZEF MARDIAK YR 2019 UL http://ar.iiarjournals.org/content/39/4/1829.abstract AB Background/Aim: Circulating tumor cells (CTCs) comprise a heterogeneous population of cancer cells with different clinical and biological value. The aim of this study was to evaluate the prognostic value of CTCs with an epithelial-mesenchymal transition (EMT) phenotype in primary breast cancer (PBC) patients. Patients and Methods: This study included 427 primary breast cancer patients. RNA extracted from CD45-depleted peripheral blood mononuclear cell (PBMCs) was evaluated for the expression of EMT transcription factors (TWIST1, SNAIL1, SLUG, ZEB1) by quantitative real time polymerase chain reaction (qRT-PCR). Results: In total, CTC EMT was detected in 77 (18.0%) patients. Patients without detectable CTC EMT in peripheral blood had significantly longer disease-free survival than patients with detectable CTC EMT. The prognostic value of CTC EMT was demonstrated in all subgroups of patients. Conclusion: CTCs with an EMT phenotype have a prognostic value in primary breast cancer.