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Published in: Breast Cancer Research and Treatment 2/2014

01-09-2014 | Clinical trial

Tumor cell dissemination to the bone marrow and blood is associated with poor outcome in patients with metastatic breast cancer

Authors: Andreas D. Hartkopf, Diana Stefanescu, Markus Wallwiener, Markus Hahn, Sven Becker, Erich-Franz Solomayer, Tanja N. Fehm, Sara Y. Brucker, Florin-Andrei Taran

Published in: Breast Cancer Research and Treatment | Issue 2/2014

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Abstract

The purpose of this study was to assess the impact of disseminated tumor cells (DTCs) on progression-free and overall survival (OS) in patients with metastatic breast cancer (MBC) and to compare it to simultaneous detection of circulating tumor cells (CTCs) from the blood in a subgroup. Disseminated tumor cells were identified in bone marrow (BM) aspirates by immunocytochemistry (pancytokeratin antibody A45-B/B3) and cytomorphology prior to the beginning of a new-line therapy. CTCs were enumerated by the CellSearch® technology. BM was obtained from 178 patients with MBC; 64/178 (36 %) patients were DTC-positive. Disseminated tumor cells occurred more frequently in patients with visceral metastases (p = 0.020) and ≥2 lines of therapy (p = 0.017). CTCs were assessed in 33 of these patients and 17/33 (52 %) patients had CTC counts ≥5 CTCs/7.5 ml blood. There was no significant association between the DTC and CTC status. Univariate analysis revealed DTC detection as a significant predictor of poor OS (p < 0.001); median OS in DTC-negative versus DTC-positive patients was 52 [95 % confidence interval (CI) 38–67] versus 28 [95 % CI 19–37] months. Moreover, as described previously, patients with ≥5 CTCs/7.5 ml blood were at an increased risk of disease progression (p = 0.026) and death (p = 0.025). Disseminated tumor cells are predictors of poor prognosis in MBC, highlighting the role of tumor cell dissemination into the BM for breast cancer progression. The absence of a significant association between concurrent DTCs and CTCs suggests they might represent different aspects of systemic BC spread.
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Metadata
Title
Tumor cell dissemination to the bone marrow and blood is associated with poor outcome in patients with metastatic breast cancer
Authors
Andreas D. Hartkopf
Diana Stefanescu
Markus Wallwiener
Markus Hahn
Sven Becker
Erich-Franz Solomayer
Tanja N. Fehm
Sara Y. Brucker
Florin-Andrei Taran
Publication date
01-09-2014
Publisher
Springer US
Published in
Breast Cancer Research and Treatment / Issue 2/2014
Print ISSN: 0167-6806
Electronic ISSN: 1573-7217
DOI
https://doi.org/10.1007/s10549-014-3113-5

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