H J Burstein1, G Curigliano2, S Loibl3, P Dubsky4, M Gnant5, P Poortmans6, M Colleoni7, C Denkert8, M Piccart-Gebhart9, M Regan10, H-J Senn11, E P Winer12, B Thurlimann11. 1. Dana-Farber Cancer Institute, Harvard Medical School, Boston, USA. Electronic address: hal_burstein@dfci.harvard.edu. 2. European Institute of Oncology, IRCCS, and University of Milano, Milan, Italy. Electronic address: giuseppe.curigliano@ieo.it. 3. German Breast Group, Neu-Isenburg, Germany. 4. Brustzentrum Hirslanden Klinik St. Anna, Lucerne, Switzerland. 5. Medical University Vienna, Vienna, Austria. 6. Department of Radiation Oncology, Institut Curie, Paris, France; Paris Sciences & Lettres University, Paris, France. 7. European Institute of Oncology, IRCCS, and University of Milano, Milan, Italy. 8. Institut für Pathologie, Charité Universitätsmedizin, Berlin, Germany. 9. Department of Medicine, Institut Jules Bordet, Université Libre de Bruxelles, Brussels, Belgium. 10. Department of Biostatistics and Computational Biology, Dana-Farber Cancer Institute, Harvard Medical School, Boston, USA. 11. Breast Center, Kantonsspital St. Gallen, St. Gallen, Switzerland. 12. Dana-Farber Cancer Institute, Harvard Medical School, Boston, USA.
Abstract
BACKGROUND: The 16th St. Gallen International Breast Cancer Conference 2019 in Vienna, Austria reviewed substantial new evidence on loco-regional and systemic therapies for early breast cancer. DESIGN: Treatments were assessed in light of their intensity, duration and side-effects, estimating the magnitude of clinical benefit according to stage and biology of the disease. The Panel acknowledged that for many patients, the impact of adjuvant therapy or the adherence to specific guidelines may have modest impact on the risk of breast cancer recurrence or overall survival. For that reason, the Panel explicitly encouraged clinicians and patients to routinely discuss the magnitude of benefit for interventions as part of the development of the treatment plan. RESULTS: The guidelines focus on common ductal and lobular breast cancer histologies arising in generally healthy women. Special breast cancer histologies may need different considerations, as do individual patients with other substantial health considerations. The panelists' opinions reflect different interpretation of available data and expert opinion where is lack of evidence and sociocultural factors in their environment such as availability of and access to medical service, economic resources and reimbursement issues. Panelists encourage patient participation in well-designed clinical studies whenever available. CONCLUSIONS: With these caveats in mind, the St. Gallen Consensus Conference seeks to provide guidance to clinicians on appropriate treatments for early-stage breast cancer and guidance for weighing the realistic tradeoffs between treatment and toxicity so that patients and clinical teams can make well-informed decisions on the basis of an honest reckoning of the magnitude of clinical benefit.
BACKGROUND: The 16th St. Gallen International Breast Cancer Conference 2019 in Vienna, Austria reviewed substantial new evidence on loco-regional and systemic therapies for early breast cancer. DESIGN: Treatments were assessed in light of their intensity, duration and side-effects, estimating the magnitude of clinical benefit according to stage and biology of the disease. The Panel acknowledged that for many patients, the impact of adjuvant therapy or the adherence to specific guidelines may have modest impact on the risk of breast cancer recurrence or overall survival. For that reason, the Panel explicitly encouraged clinicians and patients to routinely discuss the magnitude of benefit for interventions as part of the development of the treatment plan. RESULTS: The guidelines focus on common ductal and lobular breast cancer histologies arising in generally healthy women. Special breast cancer histologies may need different considerations, as do individual patients with other substantial health considerations. The panelists' opinions reflect different interpretation of available data and expert opinion where is lack of evidence and sociocultural factors in their environment such as availability of and access to medical service, economic resources and reimbursement issues. Panelists encourage patient participation in well-designed clinical studies whenever available. CONCLUSIONS: With these caveats in mind, the St. Gallen Consensus Conference seeks to provide guidance to clinicians on appropriate treatments for early-stage breast cancer and guidance for weighing the realistic tradeoffs between treatment and toxicity so that patients and clinical teams can make well-informed decisions on the basis of an honest reckoning of the magnitude of clinical benefit.
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