Abstract
The purpose of this study was to evaluate the influence of guideline-based prospective use of uPA/PAI-1 on clinical outcome in an intermediate-risk cohort of breast cancer patients. We analyzed 381 consecutive primary breast cancer patients (2003–2011) at the breast center Ostbayern meeting the following criteria: M0/N0/estrogen receptor (ER)+/G2. Clinical–pathological data, uPA/PAI-1, and follow-up data were collected. Decisions for adjuvant chemotherapy were made upon consideration of prospectively measured uPA/PAI-1. Observed disease-free survival (DFS) and overall survival (OS) were calculated by Kaplan–Meier estimates. Using guideline-based analysis of uPA/PAI-1, treatment with adjuvant chemotherapy was avoided in 86.5 % of patients with low uPA/PAI-1, i.e., 38.8 % of the total patient collective. Median follow-up was 52.5 months. Five-year relapse-free survival in intermediate-risk patients (N0, G2) without chemotherapy was 99 %. Five-year overall survival including all causes of death was 95 %. By using uPA/PAI-1, adjuvant chemotherapy can be avoided in a major part of patients with intermediate-risk breast cancer. Nevertheless, DFS and OS of these patients at 5 years remain excellent. The potential, but hardly measurable, benefit of adjuvant chemotherapy has to be set in contrast with its associated side effects and increased morbidity. Patients with high uPA/PAI-1 show benefit from chemotherapy. In this subgroup, a very good OS was observed as well. These findings strongly support the use of uPA/PAI-1 together with clinic-pathological parameters as an evidence-based, clinically relevant and inexpensive decision tool in the routine of a breast center.
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Statistical analysis (REK) was in part supported by the Breast Center of the University of Cologne.
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This analysis was performed in accordance with the ethical standards of the institutional research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.
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Kolben, T., Augustin, D., Armbrust, R. et al. Impact of guideline-based use of uPA/PAI-1 on patient outcome in intermediate-risk early breast cancer. Breast Cancer Res Treat 155, 109–115 (2016). https://doi.org/10.1007/s10549-015-3653-3
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DOI: https://doi.org/10.1007/s10549-015-3653-3