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Colleoni M, Gray KP, Gelber S, Láng I, Thürlimann B, Gianni L, Abdi EA, Gomez HL, Linderholm BK, Puglisi F, Tondini C, Kralidis E, Eniu A, Cagossi K, Rauch D, Chirgwin J, Gelber RD, Regan MM, Coates AS, Price KN, Viale G, Goldhirsch A. Low-Dose Oral Cyclophosphamide and Methotrexate Maintenance for Hormone Receptor-Negative Early Breast Cancer: International Breast Cancer Study Group Trial 22-00. J Clin Oncol 2016; 34:3400-8. [PMID: 27325862 DOI: 10.1200/jco.2015.65.6595] [Citation(s) in RCA: 55] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
PURPOSE To evaluate the benefit of low-dose cyclophosphamide and methotrexate (CM) maintenance, which previously demonstrated antitumor activity and few adverse effects in advanced breast cancer, in early breast cancer. PATIENTS AND METHODS International Breast Cancer Study Group (IBCSG) Trial 22-00, a randomized phase III clinical trial, enrolled 1,086 women (1,081 intent-to-treat) from November 2000 to December 2012. Women with estrogen receptor- and progesterone receptor-negative (< 10% positive cells by immunohistochemistry) early breast cancer any nodal and human epidermal growth factor receptor 2 status, were randomly assigned anytime between primary surgery and 56 days after the first day of last course of adjuvant chemotherapy to CM maintenance (cyclophosphamide 50 mg/day orally continuously and methotrexate 2.5 mg twice/day orally on days 1 and 2 of every week for 1 year) or to no CM. The primary end point was disease-free survival (DFS), which included invasive recurrences, second (breast and nonbreast) malignancies, and deaths. RESULTS After a median of 6.9 years of follow-up, DFS was not significantly better for patients assigned to CM maintenance compared with patients assigned to no CM, both overall (hazard ratio [HR], 0.84; 95% CI, 0.66 to 1.06;P = .14) and in triple-negative (TN) disease (n = 814; HR, 0.80; 95% CI, 0.60 to 1.06). Patients with TN, node-positive disease had a nonstatistically significant reduced HR (n = 340; HR, 0.72; 95% CI, 0.49 to 1.05). Seventy-one (13%) of 542 patients assigned to CM maintenance did not start CM. Of 473 patients who received at least one CM maintenance dose (including two patients assigned to no CM), 64 (14%) experienced a grade 3 or 4 treatment-related adverse event; elevated serum transaminases was the most frequently reported (7%), followed by leukopenia (2%). CONCLUSION CM maintenance did not produce a significant reduction in DFS events in hormone receptor-negative early breast cancer. The trend toward benefit observed in the TN, node-positive subgroup supports additional exploration of this strategy in the TN, higher-risk population.
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Affiliation(s)
- Marco Colleoni
- Marco Colleoni, Giuseppe Viale, and Aron Goldhirsch, European Institute of Oncology; Giuseppe Viale, University of Milan, Milan; Lorenzo Gianni, Ospedale degli Infermi, Rimini; Fabio Puglisi, University Hospital of Udine, University of Udine, Udine; Carlo Tondini, Osp. Papa Giovanni XXIII, Bergamo; Katia Cagossi, Ospedale di Carpi, Carpi, Italy; Kathryn P. Gray, Shari Gelber, Richard D. Gelber, Meredith M. Regan, and Karen N. Price, International Breast Cancer Study Group Statistical Center; Kathryn P. Gray, Shari Gelber, Richard D. Gelber, and Meredith M. Regan, Dana-Farber Cancer Institute; Kathryn P. Gray and Richard D. Gelber, Harvard T.H. Chan School of Public Health; Richard D. Gelber and Meredith M. Regan, Harvard Medical School; Richard D. Gelber and Karen N. Price, Frontier Science and Technology Foundation, Boston, MA; István Láng, National Institute of Oncology, Budapest, Hungary; Beat Thürlimann, Kantonsspital, St Gallen; Beat Thürlimann, Elena Kralidis, and Daniel Rauch, Swiss Group for Clinical Cancer Research, Bern; Elena Kralidis, Kantonsspital Aarau, Aarau; Daniel Rauch, Spital Thun, Thun, Switzerland; Ehtesham A. Abdi, The Tweed Head Hospital, Tweed Heads, New South Wales and Griffith University, Southport, Queensland; Ehtesham A. Abdi and Jacquie Chirgwin, Australia and New Zealand Breast Cancer Trials Group; Jacquie Chirgwin, Box Hill and Maroondah Hospitals and Monash University, Melbourne, Victoria; Alan S. Coates, International Breast Cancer Study Group and University of Sydney School of Public Health, Sydney, New South Wales, Australia; Henry L. Gomez, Instituto Nacional de Enfermedades Neoplásicas, Lima, Peru; Barbro K. Linderholm, Institute of Clinical Sciences, Sahlgrenska Academy, University of Gothenburg, and Sahlgrenska University Hospital, Gothenburg, Sweden; and Alexandru Eniu, Cancer Institute Ion Chiricuta, Cluj, Romania.
| | - Kathryn P Gray
- Marco Colleoni, Giuseppe Viale, and Aron Goldhirsch, European Institute of Oncology; Giuseppe Viale, University of Milan, Milan; Lorenzo Gianni, Ospedale degli Infermi, Rimini; Fabio Puglisi, University Hospital of Udine, University of Udine, Udine; Carlo Tondini, Osp. Papa Giovanni XXIII, Bergamo; Katia Cagossi, Ospedale di Carpi, Carpi, Italy; Kathryn P. Gray, Shari Gelber, Richard D. Gelber, Meredith M. Regan, and Karen N. Price, International Breast Cancer Study Group Statistical Center; Kathryn P. Gray, Shari Gelber, Richard D. Gelber, and Meredith M. Regan, Dana-Farber Cancer Institute; Kathryn P. Gray and Richard D. Gelber, Harvard T.H. Chan School of Public Health; Richard D. Gelber and Meredith M. Regan, Harvard Medical School; Richard D. Gelber and Karen N. Price, Frontier Science and Technology Foundation, Boston, MA; István Láng, National Institute of Oncology, Budapest, Hungary; Beat Thürlimann, Kantonsspital, St Gallen; Beat Thürlimann, Elena Kralidis, and Daniel Rauch, Swiss Group for Clinical Cancer Research, Bern; Elena Kralidis, Kantonsspital Aarau, Aarau; Daniel Rauch, Spital Thun, Thun, Switzerland; Ehtesham A. Abdi, The Tweed Head Hospital, Tweed Heads, New South Wales and Griffith University, Southport, Queensland; Ehtesham A. Abdi and Jacquie Chirgwin, Australia and New Zealand Breast Cancer Trials Group; Jacquie Chirgwin, Box Hill and Maroondah Hospitals and Monash University, Melbourne, Victoria; Alan S. Coates, International Breast Cancer Study Group and University of Sydney School of Public Health, Sydney, New South Wales, Australia; Henry L. Gomez, Instituto Nacional de Enfermedades Neoplásicas, Lima, Peru; Barbro K. Linderholm, Institute of Clinical Sciences, Sahlgrenska Academy, University of Gothenburg, and Sahlgrenska University Hospital, Gothenburg, Sweden; and Alexandru Eniu, Cancer Institute Ion Chiricuta, Cluj, Romania
| | - Shari Gelber
- Marco Colleoni, Giuseppe Viale, and Aron Goldhirsch, European Institute of Oncology; Giuseppe Viale, University of Milan, Milan; Lorenzo Gianni, Ospedale degli Infermi, Rimini; Fabio Puglisi, University Hospital of Udine, University of Udine, Udine; Carlo Tondini, Osp. Papa Giovanni XXIII, Bergamo; Katia Cagossi, Ospedale di Carpi, Carpi, Italy; Kathryn P. Gray, Shari Gelber, Richard D. Gelber, Meredith M. Regan, and Karen N. Price, International Breast Cancer Study Group Statistical Center; Kathryn P. Gray, Shari Gelber, Richard D. Gelber, and Meredith M. Regan, Dana-Farber Cancer Institute; Kathryn P. Gray and Richard D. Gelber, Harvard T.H. Chan School of Public Health; Richard D. Gelber and Meredith M. Regan, Harvard Medical School; Richard D. Gelber and Karen N. Price, Frontier Science and Technology Foundation, Boston, MA; István Láng, National Institute of Oncology, Budapest, Hungary; Beat Thürlimann, Kantonsspital, St Gallen; Beat Thürlimann, Elena Kralidis, and Daniel Rauch, Swiss Group for Clinical Cancer Research, Bern; Elena Kralidis, Kantonsspital Aarau, Aarau; Daniel Rauch, Spital Thun, Thun, Switzerland; Ehtesham A. Abdi, The Tweed Head Hospital, Tweed Heads, New South Wales and Griffith University, Southport, Queensland; Ehtesham A. Abdi and Jacquie Chirgwin, Australia and New Zealand Breast Cancer Trials Group; Jacquie Chirgwin, Box Hill and Maroondah Hospitals and Monash University, Melbourne, Victoria; Alan S. Coates, International Breast Cancer Study Group and University of Sydney School of Public Health, Sydney, New South Wales, Australia; Henry L. Gomez, Instituto Nacional de Enfermedades Neoplásicas, Lima, Peru; Barbro K. Linderholm, Institute of Clinical Sciences, Sahlgrenska Academy, University of Gothenburg, and Sahlgrenska University Hospital, Gothenburg, Sweden; and Alexandru Eniu, Cancer Institute Ion Chiricuta, Cluj, Romania
| | - István Láng
- Marco Colleoni, Giuseppe Viale, and Aron Goldhirsch, European Institute of Oncology; Giuseppe Viale, University of Milan, Milan; Lorenzo Gianni, Ospedale degli Infermi, Rimini; Fabio Puglisi, University Hospital of Udine, University of Udine, Udine; Carlo Tondini, Osp. Papa Giovanni XXIII, Bergamo; Katia Cagossi, Ospedale di Carpi, Carpi, Italy; Kathryn P. Gray, Shari Gelber, Richard D. Gelber, Meredith M. Regan, and Karen N. Price, International Breast Cancer Study Group Statistical Center; Kathryn P. Gray, Shari Gelber, Richard D. Gelber, and Meredith M. Regan, Dana-Farber Cancer Institute; Kathryn P. Gray and Richard D. Gelber, Harvard T.H. Chan School of Public Health; Richard D. Gelber and Meredith M. Regan, Harvard Medical School; Richard D. Gelber and Karen N. Price, Frontier Science and Technology Foundation, Boston, MA; István Láng, National Institute of Oncology, Budapest, Hungary; Beat Thürlimann, Kantonsspital, St Gallen; Beat Thürlimann, Elena Kralidis, and Daniel Rauch, Swiss Group for Clinical Cancer Research, Bern; Elena Kralidis, Kantonsspital Aarau, Aarau; Daniel Rauch, Spital Thun, Thun, Switzerland; Ehtesham A. Abdi, The Tweed Head Hospital, Tweed Heads, New South Wales and Griffith University, Southport, Queensland; Ehtesham A. Abdi and Jacquie Chirgwin, Australia and New Zealand Breast Cancer Trials Group; Jacquie Chirgwin, Box Hill and Maroondah Hospitals and Monash University, Melbourne, Victoria; Alan S. Coates, International Breast Cancer Study Group and University of Sydney School of Public Health, Sydney, New South Wales, Australia; Henry L. Gomez, Instituto Nacional de Enfermedades Neoplásicas, Lima, Peru; Barbro K. Linderholm, Institute of Clinical Sciences, Sahlgrenska Academy, University of Gothenburg, and Sahlgrenska University Hospital, Gothenburg, Sweden; and Alexandru Eniu, Cancer Institute Ion Chiricuta, Cluj, Romania
| | - Beat Thürlimann
- Marco Colleoni, Giuseppe Viale, and Aron Goldhirsch, European Institute of Oncology; Giuseppe Viale, University of Milan, Milan; Lorenzo Gianni, Ospedale degli Infermi, Rimini; Fabio Puglisi, University Hospital of Udine, University of Udine, Udine; Carlo Tondini, Osp. Papa Giovanni XXIII, Bergamo; Katia Cagossi, Ospedale di Carpi, Carpi, Italy; Kathryn P. Gray, Shari Gelber, Richard D. Gelber, Meredith M. Regan, and Karen N. Price, International Breast Cancer Study Group Statistical Center; Kathryn P. Gray, Shari Gelber, Richard D. Gelber, and Meredith M. Regan, Dana-Farber Cancer Institute; Kathryn P. Gray and Richard D. Gelber, Harvard T.H. Chan School of Public Health; Richard D. Gelber and Meredith M. Regan, Harvard Medical School; Richard D. Gelber and Karen N. Price, Frontier Science and Technology Foundation, Boston, MA; István Láng, National Institute of Oncology, Budapest, Hungary; Beat Thürlimann, Kantonsspital, St Gallen; Beat Thürlimann, Elena Kralidis, and Daniel Rauch, Swiss Group for Clinical Cancer Research, Bern; Elena Kralidis, Kantonsspital Aarau, Aarau; Daniel Rauch, Spital Thun, Thun, Switzerland; Ehtesham A. Abdi, The Tweed Head Hospital, Tweed Heads, New South Wales and Griffith University, Southport, Queensland; Ehtesham A. Abdi and Jacquie Chirgwin, Australia and New Zealand Breast Cancer Trials Group; Jacquie Chirgwin, Box Hill and Maroondah Hospitals and Monash University, Melbourne, Victoria; Alan S. Coates, International Breast Cancer Study Group and University of Sydney School of Public Health, Sydney, New South Wales, Australia; Henry L. Gomez, Instituto Nacional de Enfermedades Neoplásicas, Lima, Peru; Barbro K. Linderholm, Institute of Clinical Sciences, Sahlgrenska Academy, University of Gothenburg, and Sahlgrenska University Hospital, Gothenburg, Sweden; and Alexandru Eniu, Cancer Institute Ion Chiricuta, Cluj, Romania
| | - Lorenzo Gianni
- Marco Colleoni, Giuseppe Viale, and Aron Goldhirsch, European Institute of Oncology; Giuseppe Viale, University of Milan, Milan; Lorenzo Gianni, Ospedale degli Infermi, Rimini; Fabio Puglisi, University Hospital of Udine, University of Udine, Udine; Carlo Tondini, Osp. Papa Giovanni XXIII, Bergamo; Katia Cagossi, Ospedale di Carpi, Carpi, Italy; Kathryn P. Gray, Shari Gelber, Richard D. Gelber, Meredith M. Regan, and Karen N. Price, International Breast Cancer Study Group Statistical Center; Kathryn P. Gray, Shari Gelber, Richard D. Gelber, and Meredith M. Regan, Dana-Farber Cancer Institute; Kathryn P. Gray and Richard D. Gelber, Harvard T.H. Chan School of Public Health; Richard D. Gelber and Meredith M. Regan, Harvard Medical School; Richard D. Gelber and Karen N. Price, Frontier Science and Technology Foundation, Boston, MA; István Láng, National Institute of Oncology, Budapest, Hungary; Beat Thürlimann, Kantonsspital, St Gallen; Beat Thürlimann, Elena Kralidis, and Daniel Rauch, Swiss Group for Clinical Cancer Research, Bern; Elena Kralidis, Kantonsspital Aarau, Aarau; Daniel Rauch, Spital Thun, Thun, Switzerland; Ehtesham A. Abdi, The Tweed Head Hospital, Tweed Heads, New South Wales and Griffith University, Southport, Queensland; Ehtesham A. Abdi and Jacquie Chirgwin, Australia and New Zealand Breast Cancer Trials Group; Jacquie Chirgwin, Box Hill and Maroondah Hospitals and Monash University, Melbourne, Victoria; Alan S. Coates, International Breast Cancer Study Group and University of Sydney School of Public Health, Sydney, New South Wales, Australia; Henry L. Gomez, Instituto Nacional de Enfermedades Neoplásicas, Lima, Peru; Barbro K. Linderholm, Institute of Clinical Sciences, Sahlgrenska Academy, University of Gothenburg, and Sahlgrenska University Hospital, Gothenburg, Sweden; and Alexandru Eniu, Cancer Institute Ion Chiricuta, Cluj, Romania
| | - Ehtesham A Abdi
- Marco Colleoni, Giuseppe Viale, and Aron Goldhirsch, European Institute of Oncology; Giuseppe Viale, University of Milan, Milan; Lorenzo Gianni, Ospedale degli Infermi, Rimini; Fabio Puglisi, University Hospital of Udine, University of Udine, Udine; Carlo Tondini, Osp. Papa Giovanni XXIII, Bergamo; Katia Cagossi, Ospedale di Carpi, Carpi, Italy; Kathryn P. Gray, Shari Gelber, Richard D. Gelber, Meredith M. Regan, and Karen N. Price, International Breast Cancer Study Group Statistical Center; Kathryn P. Gray, Shari Gelber, Richard D. Gelber, and Meredith M. Regan, Dana-Farber Cancer Institute; Kathryn P. Gray and Richard D. Gelber, Harvard T.H. Chan School of Public Health; Richard D. Gelber and Meredith M. Regan, Harvard Medical School; Richard D. Gelber and Karen N. Price, Frontier Science and Technology Foundation, Boston, MA; István Láng, National Institute of Oncology, Budapest, Hungary; Beat Thürlimann, Kantonsspital, St Gallen; Beat Thürlimann, Elena Kralidis, and Daniel Rauch, Swiss Group for Clinical Cancer Research, Bern; Elena Kralidis, Kantonsspital Aarau, Aarau; Daniel Rauch, Spital Thun, Thun, Switzerland; Ehtesham A. Abdi, The Tweed Head Hospital, Tweed Heads, New South Wales and Griffith University, Southport, Queensland; Ehtesham A. Abdi and Jacquie Chirgwin, Australia and New Zealand Breast Cancer Trials Group; Jacquie Chirgwin, Box Hill and Maroondah Hospitals and Monash University, Melbourne, Victoria; Alan S. Coates, International Breast Cancer Study Group and University of Sydney School of Public Health, Sydney, New South Wales, Australia; Henry L. Gomez, Instituto Nacional de Enfermedades Neoplásicas, Lima, Peru; Barbro K. Linderholm, Institute of Clinical Sciences, Sahlgrenska Academy, University of Gothenburg, and Sahlgrenska University Hospital, Gothenburg, Sweden; and Alexandru Eniu, Cancer Institute Ion Chiricuta, Cluj, Romania
| | - Henry L Gomez
- Marco Colleoni, Giuseppe Viale, and Aron Goldhirsch, European Institute of Oncology; Giuseppe Viale, University of Milan, Milan; Lorenzo Gianni, Ospedale degli Infermi, Rimini; Fabio Puglisi, University Hospital of Udine, University of Udine, Udine; Carlo Tondini, Osp. Papa Giovanni XXIII, Bergamo; Katia Cagossi, Ospedale di Carpi, Carpi, Italy; Kathryn P. Gray, Shari Gelber, Richard D. Gelber, Meredith M. Regan, and Karen N. Price, International Breast Cancer Study Group Statistical Center; Kathryn P. Gray, Shari Gelber, Richard D. Gelber, and Meredith M. Regan, Dana-Farber Cancer Institute; Kathryn P. Gray and Richard D. Gelber, Harvard T.H. Chan School of Public Health; Richard D. Gelber and Meredith M. Regan, Harvard Medical School; Richard D. Gelber and Karen N. Price, Frontier Science and Technology Foundation, Boston, MA; István Láng, National Institute of Oncology, Budapest, Hungary; Beat Thürlimann, Kantonsspital, St Gallen; Beat Thürlimann, Elena Kralidis, and Daniel Rauch, Swiss Group for Clinical Cancer Research, Bern; Elena Kralidis, Kantonsspital Aarau, Aarau; Daniel Rauch, Spital Thun, Thun, Switzerland; Ehtesham A. Abdi, The Tweed Head Hospital, Tweed Heads, New South Wales and Griffith University, Southport, Queensland; Ehtesham A. Abdi and Jacquie Chirgwin, Australia and New Zealand Breast Cancer Trials Group; Jacquie Chirgwin, Box Hill and Maroondah Hospitals and Monash University, Melbourne, Victoria; Alan S. Coates, International Breast Cancer Study Group and University of Sydney School of Public Health, Sydney, New South Wales, Australia; Henry L. Gomez, Instituto Nacional de Enfermedades Neoplásicas, Lima, Peru; Barbro K. Linderholm, Institute of Clinical Sciences, Sahlgrenska Academy, University of Gothenburg, and Sahlgrenska University Hospital, Gothenburg, Sweden; and Alexandru Eniu, Cancer Institute Ion Chiricuta, Cluj, Romania
| | - Barbro K Linderholm
- Marco Colleoni, Giuseppe Viale, and Aron Goldhirsch, European Institute of Oncology; Giuseppe Viale, University of Milan, Milan; Lorenzo Gianni, Ospedale degli Infermi, Rimini; Fabio Puglisi, University Hospital of Udine, University of Udine, Udine; Carlo Tondini, Osp. Papa Giovanni XXIII, Bergamo; Katia Cagossi, Ospedale di Carpi, Carpi, Italy; Kathryn P. Gray, Shari Gelber, Richard D. Gelber, Meredith M. Regan, and Karen N. Price, International Breast Cancer Study Group Statistical Center; Kathryn P. Gray, Shari Gelber, Richard D. Gelber, and Meredith M. Regan, Dana-Farber Cancer Institute; Kathryn P. Gray and Richard D. Gelber, Harvard T.H. Chan School of Public Health; Richard D. Gelber and Meredith M. Regan, Harvard Medical School; Richard D. Gelber and Karen N. Price, Frontier Science and Technology Foundation, Boston, MA; István Láng, National Institute of Oncology, Budapest, Hungary; Beat Thürlimann, Kantonsspital, St Gallen; Beat Thürlimann, Elena Kralidis, and Daniel Rauch, Swiss Group for Clinical Cancer Research, Bern; Elena Kralidis, Kantonsspital Aarau, Aarau; Daniel Rauch, Spital Thun, Thun, Switzerland; Ehtesham A. Abdi, The Tweed Head Hospital, Tweed Heads, New South Wales and Griffith University, Southport, Queensland; Ehtesham A. Abdi and Jacquie Chirgwin, Australia and New Zealand Breast Cancer Trials Group; Jacquie Chirgwin, Box Hill and Maroondah Hospitals and Monash University, Melbourne, Victoria; Alan S. Coates, International Breast Cancer Study Group and University of Sydney School of Public Health, Sydney, New South Wales, Australia; Henry L. Gomez, Instituto Nacional de Enfermedades Neoplásicas, Lima, Peru; Barbro K. Linderholm, Institute of Clinical Sciences, Sahlgrenska Academy, University of Gothenburg, and Sahlgrenska University Hospital, Gothenburg, Sweden; and Alexandru Eniu, Cancer Institute Ion Chiricuta, Cluj, Romania
| | - Fabio Puglisi
- Marco Colleoni, Giuseppe Viale, and Aron Goldhirsch, European Institute of Oncology; Giuseppe Viale, University of Milan, Milan; Lorenzo Gianni, Ospedale degli Infermi, Rimini; Fabio Puglisi, University Hospital of Udine, University of Udine, Udine; Carlo Tondini, Osp. Papa Giovanni XXIII, Bergamo; Katia Cagossi, Ospedale di Carpi, Carpi, Italy; Kathryn P. Gray, Shari Gelber, Richard D. Gelber, Meredith M. Regan, and Karen N. Price, International Breast Cancer Study Group Statistical Center; Kathryn P. Gray, Shari Gelber, Richard D. Gelber, and Meredith M. Regan, Dana-Farber Cancer Institute; Kathryn P. Gray and Richard D. Gelber, Harvard T.H. Chan School of Public Health; Richard D. Gelber and Meredith M. Regan, Harvard Medical School; Richard D. Gelber and Karen N. Price, Frontier Science and Technology Foundation, Boston, MA; István Láng, National Institute of Oncology, Budapest, Hungary; Beat Thürlimann, Kantonsspital, St Gallen; Beat Thürlimann, Elena Kralidis, and Daniel Rauch, Swiss Group for Clinical Cancer Research, Bern; Elena Kralidis, Kantonsspital Aarau, Aarau; Daniel Rauch, Spital Thun, Thun, Switzerland; Ehtesham A. Abdi, The Tweed Head Hospital, Tweed Heads, New South Wales and Griffith University, Southport, Queensland; Ehtesham A. Abdi and Jacquie Chirgwin, Australia and New Zealand Breast Cancer Trials Group; Jacquie Chirgwin, Box Hill and Maroondah Hospitals and Monash University, Melbourne, Victoria; Alan S. Coates, International Breast Cancer Study Group and University of Sydney School of Public Health, Sydney, New South Wales, Australia; Henry L. Gomez, Instituto Nacional de Enfermedades Neoplásicas, Lima, Peru; Barbro K. Linderholm, Institute of Clinical Sciences, Sahlgrenska Academy, University of Gothenburg, and Sahlgrenska University Hospital, Gothenburg, Sweden; and Alexandru Eniu, Cancer Institute Ion Chiricuta, Cluj, Romania
| | - Carlo Tondini
- Marco Colleoni, Giuseppe Viale, and Aron Goldhirsch, European Institute of Oncology; Giuseppe Viale, University of Milan, Milan; Lorenzo Gianni, Ospedale degli Infermi, Rimini; Fabio Puglisi, University Hospital of Udine, University of Udine, Udine; Carlo Tondini, Osp. Papa Giovanni XXIII, Bergamo; Katia Cagossi, Ospedale di Carpi, Carpi, Italy; Kathryn P. Gray, Shari Gelber, Richard D. Gelber, Meredith M. Regan, and Karen N. Price, International Breast Cancer Study Group Statistical Center; Kathryn P. Gray, Shari Gelber, Richard D. Gelber, and Meredith M. Regan, Dana-Farber Cancer Institute; Kathryn P. Gray and Richard D. Gelber, Harvard T.H. Chan School of Public Health; Richard D. Gelber and Meredith M. Regan, Harvard Medical School; Richard D. Gelber and Karen N. Price, Frontier Science and Technology Foundation, Boston, MA; István Láng, National Institute of Oncology, Budapest, Hungary; Beat Thürlimann, Kantonsspital, St Gallen; Beat Thürlimann, Elena Kralidis, and Daniel Rauch, Swiss Group for Clinical Cancer Research, Bern; Elena Kralidis, Kantonsspital Aarau, Aarau; Daniel Rauch, Spital Thun, Thun, Switzerland; Ehtesham A. Abdi, The Tweed Head Hospital, Tweed Heads, New South Wales and Griffith University, Southport, Queensland; Ehtesham A. Abdi and Jacquie Chirgwin, Australia and New Zealand Breast Cancer Trials Group; Jacquie Chirgwin, Box Hill and Maroondah Hospitals and Monash University, Melbourne, Victoria; Alan S. Coates, International Breast Cancer Study Group and University of Sydney School of Public Health, Sydney, New South Wales, Australia; Henry L. Gomez, Instituto Nacional de Enfermedades Neoplásicas, Lima, Peru; Barbro K. Linderholm, Institute of Clinical Sciences, Sahlgrenska Academy, University of Gothenburg, and Sahlgrenska University Hospital, Gothenburg, Sweden; and Alexandru Eniu, Cancer Institute Ion Chiricuta, Cluj, Romania
| | - Elena Kralidis
- Marco Colleoni, Giuseppe Viale, and Aron Goldhirsch, European Institute of Oncology; Giuseppe Viale, University of Milan, Milan; Lorenzo Gianni, Ospedale degli Infermi, Rimini; Fabio Puglisi, University Hospital of Udine, University of Udine, Udine; Carlo Tondini, Osp. Papa Giovanni XXIII, Bergamo; Katia Cagossi, Ospedale di Carpi, Carpi, Italy; Kathryn P. Gray, Shari Gelber, Richard D. Gelber, Meredith M. Regan, and Karen N. Price, International Breast Cancer Study Group Statistical Center; Kathryn P. Gray, Shari Gelber, Richard D. Gelber, and Meredith M. Regan, Dana-Farber Cancer Institute; Kathryn P. Gray and Richard D. Gelber, Harvard T.H. Chan School of Public Health; Richard D. Gelber and Meredith M. Regan, Harvard Medical School; Richard D. Gelber and Karen N. Price, Frontier Science and Technology Foundation, Boston, MA; István Láng, National Institute of Oncology, Budapest, Hungary; Beat Thürlimann, Kantonsspital, St Gallen; Beat Thürlimann, Elena Kralidis, and Daniel Rauch, Swiss Group for Clinical Cancer Research, Bern; Elena Kralidis, Kantonsspital Aarau, Aarau; Daniel Rauch, Spital Thun, Thun, Switzerland; Ehtesham A. Abdi, The Tweed Head Hospital, Tweed Heads, New South Wales and Griffith University, Southport, Queensland; Ehtesham A. Abdi and Jacquie Chirgwin, Australia and New Zealand Breast Cancer Trials Group; Jacquie Chirgwin, Box Hill and Maroondah Hospitals and Monash University, Melbourne, Victoria; Alan S. Coates, International Breast Cancer Study Group and University of Sydney School of Public Health, Sydney, New South Wales, Australia; Henry L. Gomez, Instituto Nacional de Enfermedades Neoplásicas, Lima, Peru; Barbro K. Linderholm, Institute of Clinical Sciences, Sahlgrenska Academy, University of Gothenburg, and Sahlgrenska University Hospital, Gothenburg, Sweden; and Alexandru Eniu, Cancer Institute Ion Chiricuta, Cluj, Romania
| | - Alexandru Eniu
- Marco Colleoni, Giuseppe Viale, and Aron Goldhirsch, European Institute of Oncology; Giuseppe Viale, University of Milan, Milan; Lorenzo Gianni, Ospedale degli Infermi, Rimini; Fabio Puglisi, University Hospital of Udine, University of Udine, Udine; Carlo Tondini, Osp. Papa Giovanni XXIII, Bergamo; Katia Cagossi, Ospedale di Carpi, Carpi, Italy; Kathryn P. Gray, Shari Gelber, Richard D. Gelber, Meredith M. Regan, and Karen N. Price, International Breast Cancer Study Group Statistical Center; Kathryn P. Gray, Shari Gelber, Richard D. Gelber, and Meredith M. Regan, Dana-Farber Cancer Institute; Kathryn P. Gray and Richard D. Gelber, Harvard T.H. Chan School of Public Health; Richard D. Gelber and Meredith M. Regan, Harvard Medical School; Richard D. Gelber and Karen N. Price, Frontier Science and Technology Foundation, Boston, MA; István Láng, National Institute of Oncology, Budapest, Hungary; Beat Thürlimann, Kantonsspital, St Gallen; Beat Thürlimann, Elena Kralidis, and Daniel Rauch, Swiss Group for Clinical Cancer Research, Bern; Elena Kralidis, Kantonsspital Aarau, Aarau; Daniel Rauch, Spital Thun, Thun, Switzerland; Ehtesham A. Abdi, The Tweed Head Hospital, Tweed Heads, New South Wales and Griffith University, Southport, Queensland; Ehtesham A. Abdi and Jacquie Chirgwin, Australia and New Zealand Breast Cancer Trials Group; Jacquie Chirgwin, Box Hill and Maroondah Hospitals and Monash University, Melbourne, Victoria; Alan S. Coates, International Breast Cancer Study Group and University of Sydney School of Public Health, Sydney, New South Wales, Australia; Henry L. Gomez, Instituto Nacional de Enfermedades Neoplásicas, Lima, Peru; Barbro K. Linderholm, Institute of Clinical Sciences, Sahlgrenska Academy, University of Gothenburg, and Sahlgrenska University Hospital, Gothenburg, Sweden; and Alexandru Eniu, Cancer Institute Ion Chiricuta, Cluj, Romania
| | - Katia Cagossi
- Marco Colleoni, Giuseppe Viale, and Aron Goldhirsch, European Institute of Oncology; Giuseppe Viale, University of Milan, Milan; Lorenzo Gianni, Ospedale degli Infermi, Rimini; Fabio Puglisi, University Hospital of Udine, University of Udine, Udine; Carlo Tondini, Osp. Papa Giovanni XXIII, Bergamo; Katia Cagossi, Ospedale di Carpi, Carpi, Italy; Kathryn P. Gray, Shari Gelber, Richard D. Gelber, Meredith M. Regan, and Karen N. Price, International Breast Cancer Study Group Statistical Center; Kathryn P. Gray, Shari Gelber, Richard D. Gelber, and Meredith M. Regan, Dana-Farber Cancer Institute; Kathryn P. Gray and Richard D. Gelber, Harvard T.H. Chan School of Public Health; Richard D. Gelber and Meredith M. Regan, Harvard Medical School; Richard D. Gelber and Karen N. Price, Frontier Science and Technology Foundation, Boston, MA; István Láng, National Institute of Oncology, Budapest, Hungary; Beat Thürlimann, Kantonsspital, St Gallen; Beat Thürlimann, Elena Kralidis, and Daniel Rauch, Swiss Group for Clinical Cancer Research, Bern; Elena Kralidis, Kantonsspital Aarau, Aarau; Daniel Rauch, Spital Thun, Thun, Switzerland; Ehtesham A. Abdi, The Tweed Head Hospital, Tweed Heads, New South Wales and Griffith University, Southport, Queensland; Ehtesham A. Abdi and Jacquie Chirgwin, Australia and New Zealand Breast Cancer Trials Group; Jacquie Chirgwin, Box Hill and Maroondah Hospitals and Monash University, Melbourne, Victoria; Alan S. Coates, International Breast Cancer Study Group and University of Sydney School of Public Health, Sydney, New South Wales, Australia; Henry L. Gomez, Instituto Nacional de Enfermedades Neoplásicas, Lima, Peru; Barbro K. Linderholm, Institute of Clinical Sciences, Sahlgrenska Academy, University of Gothenburg, and Sahlgrenska University Hospital, Gothenburg, Sweden; and Alexandru Eniu, Cancer Institute Ion Chiricuta, Cluj, Romania
| | - Daniel Rauch
- Marco Colleoni, Giuseppe Viale, and Aron Goldhirsch, European Institute of Oncology; Giuseppe Viale, University of Milan, Milan; Lorenzo Gianni, Ospedale degli Infermi, Rimini; Fabio Puglisi, University Hospital of Udine, University of Udine, Udine; Carlo Tondini, Osp. Papa Giovanni XXIII, Bergamo; Katia Cagossi, Ospedale di Carpi, Carpi, Italy; Kathryn P. Gray, Shari Gelber, Richard D. Gelber, Meredith M. Regan, and Karen N. Price, International Breast Cancer Study Group Statistical Center; Kathryn P. Gray, Shari Gelber, Richard D. Gelber, and Meredith M. Regan, Dana-Farber Cancer Institute; Kathryn P. Gray and Richard D. Gelber, Harvard T.H. Chan School of Public Health; Richard D. Gelber and Meredith M. Regan, Harvard Medical School; Richard D. Gelber and Karen N. Price, Frontier Science and Technology Foundation, Boston, MA; István Láng, National Institute of Oncology, Budapest, Hungary; Beat Thürlimann, Kantonsspital, St Gallen; Beat Thürlimann, Elena Kralidis, and Daniel Rauch, Swiss Group for Clinical Cancer Research, Bern; Elena Kralidis, Kantonsspital Aarau, Aarau; Daniel Rauch, Spital Thun, Thun, Switzerland; Ehtesham A. Abdi, The Tweed Head Hospital, Tweed Heads, New South Wales and Griffith University, Southport, Queensland; Ehtesham A. Abdi and Jacquie Chirgwin, Australia and New Zealand Breast Cancer Trials Group; Jacquie Chirgwin, Box Hill and Maroondah Hospitals and Monash University, Melbourne, Victoria; Alan S. Coates, International Breast Cancer Study Group and University of Sydney School of Public Health, Sydney, New South Wales, Australia; Henry L. Gomez, Instituto Nacional de Enfermedades Neoplásicas, Lima, Peru; Barbro K. Linderholm, Institute of Clinical Sciences, Sahlgrenska Academy, University of Gothenburg, and Sahlgrenska University Hospital, Gothenburg, Sweden; and Alexandru Eniu, Cancer Institute Ion Chiricuta, Cluj, Romania
| | - Jacquie Chirgwin
- Marco Colleoni, Giuseppe Viale, and Aron Goldhirsch, European Institute of Oncology; Giuseppe Viale, University of Milan, Milan; Lorenzo Gianni, Ospedale degli Infermi, Rimini; Fabio Puglisi, University Hospital of Udine, University of Udine, Udine; Carlo Tondini, Osp. Papa Giovanni XXIII, Bergamo; Katia Cagossi, Ospedale di Carpi, Carpi, Italy; Kathryn P. Gray, Shari Gelber, Richard D. Gelber, Meredith M. Regan, and Karen N. Price, International Breast Cancer Study Group Statistical Center; Kathryn P. Gray, Shari Gelber, Richard D. Gelber, and Meredith M. Regan, Dana-Farber Cancer Institute; Kathryn P. Gray and Richard D. Gelber, Harvard T.H. Chan School of Public Health; Richard D. Gelber and Meredith M. Regan, Harvard Medical School; Richard D. Gelber and Karen N. Price, Frontier Science and Technology Foundation, Boston, MA; István Láng, National Institute of Oncology, Budapest, Hungary; Beat Thürlimann, Kantonsspital, St Gallen; Beat Thürlimann, Elena Kralidis, and Daniel Rauch, Swiss Group for Clinical Cancer Research, Bern; Elena Kralidis, Kantonsspital Aarau, Aarau; Daniel Rauch, Spital Thun, Thun, Switzerland; Ehtesham A. Abdi, The Tweed Head Hospital, Tweed Heads, New South Wales and Griffith University, Southport, Queensland; Ehtesham A. Abdi and Jacquie Chirgwin, Australia and New Zealand Breast Cancer Trials Group; Jacquie Chirgwin, Box Hill and Maroondah Hospitals and Monash University, Melbourne, Victoria; Alan S. Coates, International Breast Cancer Study Group and University of Sydney School of Public Health, Sydney, New South Wales, Australia; Henry L. Gomez, Instituto Nacional de Enfermedades Neoplásicas, Lima, Peru; Barbro K. Linderholm, Institute of Clinical Sciences, Sahlgrenska Academy, University of Gothenburg, and Sahlgrenska University Hospital, Gothenburg, Sweden; and Alexandru Eniu, Cancer Institute Ion Chiricuta, Cluj, Romania
| | - Richard D Gelber
- Marco Colleoni, Giuseppe Viale, and Aron Goldhirsch, European Institute of Oncology; Giuseppe Viale, University of Milan, Milan; Lorenzo Gianni, Ospedale degli Infermi, Rimini; Fabio Puglisi, University Hospital of Udine, University of Udine, Udine; Carlo Tondini, Osp. Papa Giovanni XXIII, Bergamo; Katia Cagossi, Ospedale di Carpi, Carpi, Italy; Kathryn P. Gray, Shari Gelber, Richard D. Gelber, Meredith M. Regan, and Karen N. Price, International Breast Cancer Study Group Statistical Center; Kathryn P. Gray, Shari Gelber, Richard D. Gelber, and Meredith M. Regan, Dana-Farber Cancer Institute; Kathryn P. Gray and Richard D. Gelber, Harvard T.H. Chan School of Public Health; Richard D. Gelber and Meredith M. Regan, Harvard Medical School; Richard D. Gelber and Karen N. Price, Frontier Science and Technology Foundation, Boston, MA; István Láng, National Institute of Oncology, Budapest, Hungary; Beat Thürlimann, Kantonsspital, St Gallen; Beat Thürlimann, Elena Kralidis, and Daniel Rauch, Swiss Group for Clinical Cancer Research, Bern; Elena Kralidis, Kantonsspital Aarau, Aarau; Daniel Rauch, Spital Thun, Thun, Switzerland; Ehtesham A. Abdi, The Tweed Head Hospital, Tweed Heads, New South Wales and Griffith University, Southport, Queensland; Ehtesham A. Abdi and Jacquie Chirgwin, Australia and New Zealand Breast Cancer Trials Group; Jacquie Chirgwin, Box Hill and Maroondah Hospitals and Monash University, Melbourne, Victoria; Alan S. Coates, International Breast Cancer Study Group and University of Sydney School of Public Health, Sydney, New South Wales, Australia; Henry L. Gomez, Instituto Nacional de Enfermedades Neoplásicas, Lima, Peru; Barbro K. Linderholm, Institute of Clinical Sciences, Sahlgrenska Academy, University of Gothenburg, and Sahlgrenska University Hospital, Gothenburg, Sweden; and Alexandru Eniu, Cancer Institute Ion Chiricuta, Cluj, Romania
| | - Meredith M Regan
- Marco Colleoni, Giuseppe Viale, and Aron Goldhirsch, European Institute of Oncology; Giuseppe Viale, University of Milan, Milan; Lorenzo Gianni, Ospedale degli Infermi, Rimini; Fabio Puglisi, University Hospital of Udine, University of Udine, Udine; Carlo Tondini, Osp. Papa Giovanni XXIII, Bergamo; Katia Cagossi, Ospedale di Carpi, Carpi, Italy; Kathryn P. Gray, Shari Gelber, Richard D. Gelber, Meredith M. Regan, and Karen N. Price, International Breast Cancer Study Group Statistical Center; Kathryn P. Gray, Shari Gelber, Richard D. Gelber, and Meredith M. Regan, Dana-Farber Cancer Institute; Kathryn P. Gray and Richard D. Gelber, Harvard T.H. Chan School of Public Health; Richard D. Gelber and Meredith M. Regan, Harvard Medical School; Richard D. Gelber and Karen N. Price, Frontier Science and Technology Foundation, Boston, MA; István Láng, National Institute of Oncology, Budapest, Hungary; Beat Thürlimann, Kantonsspital, St Gallen; Beat Thürlimann, Elena Kralidis, and Daniel Rauch, Swiss Group for Clinical Cancer Research, Bern; Elena Kralidis, Kantonsspital Aarau, Aarau; Daniel Rauch, Spital Thun, Thun, Switzerland; Ehtesham A. Abdi, The Tweed Head Hospital, Tweed Heads, New South Wales and Griffith University, Southport, Queensland; Ehtesham A. Abdi and Jacquie Chirgwin, Australia and New Zealand Breast Cancer Trials Group; Jacquie Chirgwin, Box Hill and Maroondah Hospitals and Monash University, Melbourne, Victoria; Alan S. Coates, International Breast Cancer Study Group and University of Sydney School of Public Health, Sydney, New South Wales, Australia; Henry L. Gomez, Instituto Nacional de Enfermedades Neoplásicas, Lima, Peru; Barbro K. Linderholm, Institute of Clinical Sciences, Sahlgrenska Academy, University of Gothenburg, and Sahlgrenska University Hospital, Gothenburg, Sweden; and Alexandru Eniu, Cancer Institute Ion Chiricuta, Cluj, Romania
| | - Alan S Coates
- Marco Colleoni, Giuseppe Viale, and Aron Goldhirsch, European Institute of Oncology; Giuseppe Viale, University of Milan, Milan; Lorenzo Gianni, Ospedale degli Infermi, Rimini; Fabio Puglisi, University Hospital of Udine, University of Udine, Udine; Carlo Tondini, Osp. Papa Giovanni XXIII, Bergamo; Katia Cagossi, Ospedale di Carpi, Carpi, Italy; Kathryn P. Gray, Shari Gelber, Richard D. Gelber, Meredith M. Regan, and Karen N. Price, International Breast Cancer Study Group Statistical Center; Kathryn P. Gray, Shari Gelber, Richard D. Gelber, and Meredith M. Regan, Dana-Farber Cancer Institute; Kathryn P. Gray and Richard D. Gelber, Harvard T.H. Chan School of Public Health; Richard D. Gelber and Meredith M. Regan, Harvard Medical School; Richard D. Gelber and Karen N. Price, Frontier Science and Technology Foundation, Boston, MA; István Láng, National Institute of Oncology, Budapest, Hungary; Beat Thürlimann, Kantonsspital, St Gallen; Beat Thürlimann, Elena Kralidis, and Daniel Rauch, Swiss Group for Clinical Cancer Research, Bern; Elena Kralidis, Kantonsspital Aarau, Aarau; Daniel Rauch, Spital Thun, Thun, Switzerland; Ehtesham A. Abdi, The Tweed Head Hospital, Tweed Heads, New South Wales and Griffith University, Southport, Queensland; Ehtesham A. Abdi and Jacquie Chirgwin, Australia and New Zealand Breast Cancer Trials Group; Jacquie Chirgwin, Box Hill and Maroondah Hospitals and Monash University, Melbourne, Victoria; Alan S. Coates, International Breast Cancer Study Group and University of Sydney School of Public Health, Sydney, New South Wales, Australia; Henry L. Gomez, Instituto Nacional de Enfermedades Neoplásicas, Lima, Peru; Barbro K. Linderholm, Institute of Clinical Sciences, Sahlgrenska Academy, University of Gothenburg, and Sahlgrenska University Hospital, Gothenburg, Sweden; and Alexandru Eniu, Cancer Institute Ion Chiricuta, Cluj, Romania
| | - Karen N Price
- Marco Colleoni, Giuseppe Viale, and Aron Goldhirsch, European Institute of Oncology; Giuseppe Viale, University of Milan, Milan; Lorenzo Gianni, Ospedale degli Infermi, Rimini; Fabio Puglisi, University Hospital of Udine, University of Udine, Udine; Carlo Tondini, Osp. Papa Giovanni XXIII, Bergamo; Katia Cagossi, Ospedale di Carpi, Carpi, Italy; Kathryn P. Gray, Shari Gelber, Richard D. Gelber, Meredith M. Regan, and Karen N. Price, International Breast Cancer Study Group Statistical Center; Kathryn P. Gray, Shari Gelber, Richard D. Gelber, and Meredith M. Regan, Dana-Farber Cancer Institute; Kathryn P. Gray and Richard D. Gelber, Harvard T.H. Chan School of Public Health; Richard D. Gelber and Meredith M. Regan, Harvard Medical School; Richard D. Gelber and Karen N. Price, Frontier Science and Technology Foundation, Boston, MA; István Láng, National Institute of Oncology, Budapest, Hungary; Beat Thürlimann, Kantonsspital, St Gallen; Beat Thürlimann, Elena Kralidis, and Daniel Rauch, Swiss Group for Clinical Cancer Research, Bern; Elena Kralidis, Kantonsspital Aarau, Aarau; Daniel Rauch, Spital Thun, Thun, Switzerland; Ehtesham A. Abdi, The Tweed Head Hospital, Tweed Heads, New South Wales and Griffith University, Southport, Queensland; Ehtesham A. Abdi and Jacquie Chirgwin, Australia and New Zealand Breast Cancer Trials Group; Jacquie Chirgwin, Box Hill and Maroondah Hospitals and Monash University, Melbourne, Victoria; Alan S. Coates, International Breast Cancer Study Group and University of Sydney School of Public Health, Sydney, New South Wales, Australia; Henry L. Gomez, Instituto Nacional de Enfermedades Neoplásicas, Lima, Peru; Barbro K. Linderholm, Institute of Clinical Sciences, Sahlgrenska Academy, University of Gothenburg, and Sahlgrenska University Hospital, Gothenburg, Sweden; and Alexandru Eniu, Cancer Institute Ion Chiricuta, Cluj, Romania
| | - Giuseppe Viale
- Marco Colleoni, Giuseppe Viale, and Aron Goldhirsch, European Institute of Oncology; Giuseppe Viale, University of Milan, Milan; Lorenzo Gianni, Ospedale degli Infermi, Rimini; Fabio Puglisi, University Hospital of Udine, University of Udine, Udine; Carlo Tondini, Osp. Papa Giovanni XXIII, Bergamo; Katia Cagossi, Ospedale di Carpi, Carpi, Italy; Kathryn P. Gray, Shari Gelber, Richard D. Gelber, Meredith M. Regan, and Karen N. Price, International Breast Cancer Study Group Statistical Center; Kathryn P. Gray, Shari Gelber, Richard D. Gelber, and Meredith M. Regan, Dana-Farber Cancer Institute; Kathryn P. Gray and Richard D. Gelber, Harvard T.H. Chan School of Public Health; Richard D. Gelber and Meredith M. Regan, Harvard Medical School; Richard D. Gelber and Karen N. Price, Frontier Science and Technology Foundation, Boston, MA; István Láng, National Institute of Oncology, Budapest, Hungary; Beat Thürlimann, Kantonsspital, St Gallen; Beat Thürlimann, Elena Kralidis, and Daniel Rauch, Swiss Group for Clinical Cancer Research, Bern; Elena Kralidis, Kantonsspital Aarau, Aarau; Daniel Rauch, Spital Thun, Thun, Switzerland; Ehtesham A. Abdi, The Tweed Head Hospital, Tweed Heads, New South Wales and Griffith University, Southport, Queensland; Ehtesham A. Abdi and Jacquie Chirgwin, Australia and New Zealand Breast Cancer Trials Group; Jacquie Chirgwin, Box Hill and Maroondah Hospitals and Monash University, Melbourne, Victoria; Alan S. Coates, International Breast Cancer Study Group and University of Sydney School of Public Health, Sydney, New South Wales, Australia; Henry L. Gomez, Instituto Nacional de Enfermedades Neoplásicas, Lima, Peru; Barbro K. Linderholm, Institute of Clinical Sciences, Sahlgrenska Academy, University of Gothenburg, and Sahlgrenska University Hospital, Gothenburg, Sweden; and Alexandru Eniu, Cancer Institute Ion Chiricuta, Cluj, Romania
| | - Aron Goldhirsch
- Marco Colleoni, Giuseppe Viale, and Aron Goldhirsch, European Institute of Oncology; Giuseppe Viale, University of Milan, Milan; Lorenzo Gianni, Ospedale degli Infermi, Rimini; Fabio Puglisi, University Hospital of Udine, University of Udine, Udine; Carlo Tondini, Osp. Papa Giovanni XXIII, Bergamo; Katia Cagossi, Ospedale di Carpi, Carpi, Italy; Kathryn P. Gray, Shari Gelber, Richard D. Gelber, Meredith M. Regan, and Karen N. Price, International Breast Cancer Study Group Statistical Center; Kathryn P. Gray, Shari Gelber, Richard D. Gelber, and Meredith M. Regan, Dana-Farber Cancer Institute; Kathryn P. Gray and Richard D. Gelber, Harvard T.H. Chan School of Public Health; Richard D. Gelber and Meredith M. Regan, Harvard Medical School; Richard D. Gelber and Karen N. Price, Frontier Science and Technology Foundation, Boston, MA; István Láng, National Institute of Oncology, Budapest, Hungary; Beat Thürlimann, Kantonsspital, St Gallen; Beat Thürlimann, Elena Kralidis, and Daniel Rauch, Swiss Group for Clinical Cancer Research, Bern; Elena Kralidis, Kantonsspital Aarau, Aarau; Daniel Rauch, Spital Thun, Thun, Switzerland; Ehtesham A. Abdi, The Tweed Head Hospital, Tweed Heads, New South Wales and Griffith University, Southport, Queensland; Ehtesham A. Abdi and Jacquie Chirgwin, Australia and New Zealand Breast Cancer Trials Group; Jacquie Chirgwin, Box Hill and Maroondah Hospitals and Monash University, Melbourne, Victoria; Alan S. Coates, International Breast Cancer Study Group and University of Sydney School of Public Health, Sydney, New South Wales, Australia; Henry L. Gomez, Instituto Nacional de Enfermedades Neoplásicas, Lima, Peru; Barbro K. Linderholm, Institute of Clinical Sciences, Sahlgrenska Academy, University of Gothenburg, and Sahlgrenska University Hospital, Gothenburg, Sweden; and Alexandru Eniu, Cancer Institute Ion Chiricuta, Cluj, Romania
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Colleoni M, Sun Z, Price KN, Karlsson P, Forbes JF, Thürlimann B, Gianni L, Castiglione M, Gelber RD, Coates AS, Goldhirsch A. Annual Hazard Rates of Recurrence for Breast Cancer During 24 Years of Follow-Up: Results From the International Breast Cancer Study Group Trials I to V. J Clin Oncol 2016; 34:927-35. [PMID: 26786933 DOI: 10.1200/jco.2015.62.3504] [Citation(s) in RCA: 339] [Impact Index Per Article: 42.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023] Open
Abstract
PURPOSE Predicting the pattern of recurrence can aid in the development of targeted surveillance and treatment strategies. We identified patient populations that remain at risk for an event at a median follow-up of 24 years from the diagnosis of operable breast cancer. PATIENTS AND METHODS International Breast Cancer Study Group clinical trials I to V randomly assigned 4,105 patients between 1978 and 1985. Annualized hazards were estimated for breast cancer-free interval (primary end point), disease-free survival, and overall survival. RESULTS For the entire group, the annualized hazard of recurrence was highest during the first 5 years (10.4%), with a peak between years 1 and 2 (15.2%). During the first 5 years, patients with estrogen receptor (ER)--positive disease had a lower annualized hazard compared with those with ER-negative disease (9.9% v 11.5%; P = .01). However, beyond 5 years, patients with ER-positive disease had higher hazards (5 to 10 years: 5.4% v 3.3%; 10 to 15 years: 2.9% v 1.3%; 15 to 20 years: 2.8% v 1.2%; and 20 to 25 years: 1.3% v 1.4%; P < .001). Among patients with ER-positive disease, annualized hazards of recurrence remained elevated and fairly stable beyond 10 years, even for those with no axillary involvement (2.0%, 2.1%, and 1.1% for years 10 to 15, 15 to 20, and 20 to 25, respectively) and for those with one to three positive nodes (3.0%, 3.5%, and 1.5%, respectively). CONCLUSION Patients with ER-positive breast cancer maintain a significant recurrence rate during extended follow up. Strategies for follow up and treatments to prevent recurrences may be most efficiently applied and studied in patients with ER-positive disease followed for a long period of time.
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Affiliation(s)
- Marco Colleoni
- Marco Colleoni and Aron Goldhirsch, European Institute of Oncology and International Breast Cancer Study Group, Milan; Lorenzo Gianni, Ospedale degli Infermi and Istituto Scientifico Romagnolo per lo Studio e la Cura dei Tumori, Rimini, Italy; Zhuoxin Sun, Karen N. Price, and Richard D. Gelber, International Breast Cancer Study Group Statistical Center and Frontier Science and Technology Research Foundation; Zhuoxin Sun and Richard D. Gelber, Harvard T.F. Chan School of Public Health; Richard D. Gelber, Dana-Farber Cancer Institute and Harvard Medical School, Boston, MA; Per Karlsson, Institute of Selected Clinical Sciences, Sahlgrenska Academy, Sahlgrenska University Hospital, Gothenburg, Sweden; John F. Forbes, Australia and New Zealand Breast Cancer Trials Group, University of Newcastle, Newcastle Mater Hospital, Newcastle; Alan S. Coates, International Breast Cancer Study Group and University of Sydney, Sydney, New South Wales, Australia; Beat Thürlimann, Breast Center Kantonsspital, St Gallen, and Swiss Group for Clinical Cancer Research; and Monica Castiglione, International Breast Cancer Study Group, Bern, Switzerland.
| | - Zhuoxin Sun
- Marco Colleoni and Aron Goldhirsch, European Institute of Oncology and International Breast Cancer Study Group, Milan; Lorenzo Gianni, Ospedale degli Infermi and Istituto Scientifico Romagnolo per lo Studio e la Cura dei Tumori, Rimini, Italy; Zhuoxin Sun, Karen N. Price, and Richard D. Gelber, International Breast Cancer Study Group Statistical Center and Frontier Science and Technology Research Foundation; Zhuoxin Sun and Richard D. Gelber, Harvard T.F. Chan School of Public Health; Richard D. Gelber, Dana-Farber Cancer Institute and Harvard Medical School, Boston, MA; Per Karlsson, Institute of Selected Clinical Sciences, Sahlgrenska Academy, Sahlgrenska University Hospital, Gothenburg, Sweden; John F. Forbes, Australia and New Zealand Breast Cancer Trials Group, University of Newcastle, Newcastle Mater Hospital, Newcastle; Alan S. Coates, International Breast Cancer Study Group and University of Sydney, Sydney, New South Wales, Australia; Beat Thürlimann, Breast Center Kantonsspital, St Gallen, and Swiss Group for Clinical Cancer Research; and Monica Castiglione, International Breast Cancer Study Group, Bern, Switzerland
| | - Karen N Price
- Marco Colleoni and Aron Goldhirsch, European Institute of Oncology and International Breast Cancer Study Group, Milan; Lorenzo Gianni, Ospedale degli Infermi and Istituto Scientifico Romagnolo per lo Studio e la Cura dei Tumori, Rimini, Italy; Zhuoxin Sun, Karen N. Price, and Richard D. Gelber, International Breast Cancer Study Group Statistical Center and Frontier Science and Technology Research Foundation; Zhuoxin Sun and Richard D. Gelber, Harvard T.F. Chan School of Public Health; Richard D. Gelber, Dana-Farber Cancer Institute and Harvard Medical School, Boston, MA; Per Karlsson, Institute of Selected Clinical Sciences, Sahlgrenska Academy, Sahlgrenska University Hospital, Gothenburg, Sweden; John F. Forbes, Australia and New Zealand Breast Cancer Trials Group, University of Newcastle, Newcastle Mater Hospital, Newcastle; Alan S. Coates, International Breast Cancer Study Group and University of Sydney, Sydney, New South Wales, Australia; Beat Thürlimann, Breast Center Kantonsspital, St Gallen, and Swiss Group for Clinical Cancer Research; and Monica Castiglione, International Breast Cancer Study Group, Bern, Switzerland
| | - Per Karlsson
- Marco Colleoni and Aron Goldhirsch, European Institute of Oncology and International Breast Cancer Study Group, Milan; Lorenzo Gianni, Ospedale degli Infermi and Istituto Scientifico Romagnolo per lo Studio e la Cura dei Tumori, Rimini, Italy; Zhuoxin Sun, Karen N. Price, and Richard D. Gelber, International Breast Cancer Study Group Statistical Center and Frontier Science and Technology Research Foundation; Zhuoxin Sun and Richard D. Gelber, Harvard T.F. Chan School of Public Health; Richard D. Gelber, Dana-Farber Cancer Institute and Harvard Medical School, Boston, MA; Per Karlsson, Institute of Selected Clinical Sciences, Sahlgrenska Academy, Sahlgrenska University Hospital, Gothenburg, Sweden; John F. Forbes, Australia and New Zealand Breast Cancer Trials Group, University of Newcastle, Newcastle Mater Hospital, Newcastle; Alan S. Coates, International Breast Cancer Study Group and University of Sydney, Sydney, New South Wales, Australia; Beat Thürlimann, Breast Center Kantonsspital, St Gallen, and Swiss Group for Clinical Cancer Research; and Monica Castiglione, International Breast Cancer Study Group, Bern, Switzerland
| | - John F Forbes
- Marco Colleoni and Aron Goldhirsch, European Institute of Oncology and International Breast Cancer Study Group, Milan; Lorenzo Gianni, Ospedale degli Infermi and Istituto Scientifico Romagnolo per lo Studio e la Cura dei Tumori, Rimini, Italy; Zhuoxin Sun, Karen N. Price, and Richard D. Gelber, International Breast Cancer Study Group Statistical Center and Frontier Science and Technology Research Foundation; Zhuoxin Sun and Richard D. Gelber, Harvard T.F. Chan School of Public Health; Richard D. Gelber, Dana-Farber Cancer Institute and Harvard Medical School, Boston, MA; Per Karlsson, Institute of Selected Clinical Sciences, Sahlgrenska Academy, Sahlgrenska University Hospital, Gothenburg, Sweden; John F. Forbes, Australia and New Zealand Breast Cancer Trials Group, University of Newcastle, Newcastle Mater Hospital, Newcastle; Alan S. Coates, International Breast Cancer Study Group and University of Sydney, Sydney, New South Wales, Australia; Beat Thürlimann, Breast Center Kantonsspital, St Gallen, and Swiss Group for Clinical Cancer Research; and Monica Castiglione, International Breast Cancer Study Group, Bern, Switzerland
| | - Beat Thürlimann
- Marco Colleoni and Aron Goldhirsch, European Institute of Oncology and International Breast Cancer Study Group, Milan; Lorenzo Gianni, Ospedale degli Infermi and Istituto Scientifico Romagnolo per lo Studio e la Cura dei Tumori, Rimini, Italy; Zhuoxin Sun, Karen N. Price, and Richard D. Gelber, International Breast Cancer Study Group Statistical Center and Frontier Science and Technology Research Foundation; Zhuoxin Sun and Richard D. Gelber, Harvard T.F. Chan School of Public Health; Richard D. Gelber, Dana-Farber Cancer Institute and Harvard Medical School, Boston, MA; Per Karlsson, Institute of Selected Clinical Sciences, Sahlgrenska Academy, Sahlgrenska University Hospital, Gothenburg, Sweden; John F. Forbes, Australia and New Zealand Breast Cancer Trials Group, University of Newcastle, Newcastle Mater Hospital, Newcastle; Alan S. Coates, International Breast Cancer Study Group and University of Sydney, Sydney, New South Wales, Australia; Beat Thürlimann, Breast Center Kantonsspital, St Gallen, and Swiss Group for Clinical Cancer Research; and Monica Castiglione, International Breast Cancer Study Group, Bern, Switzerland
| | - Lorenzo Gianni
- Marco Colleoni and Aron Goldhirsch, European Institute of Oncology and International Breast Cancer Study Group, Milan; Lorenzo Gianni, Ospedale degli Infermi and Istituto Scientifico Romagnolo per lo Studio e la Cura dei Tumori, Rimini, Italy; Zhuoxin Sun, Karen N. Price, and Richard D. Gelber, International Breast Cancer Study Group Statistical Center and Frontier Science and Technology Research Foundation; Zhuoxin Sun and Richard D. Gelber, Harvard T.F. Chan School of Public Health; Richard D. Gelber, Dana-Farber Cancer Institute and Harvard Medical School, Boston, MA; Per Karlsson, Institute of Selected Clinical Sciences, Sahlgrenska Academy, Sahlgrenska University Hospital, Gothenburg, Sweden; John F. Forbes, Australia and New Zealand Breast Cancer Trials Group, University of Newcastle, Newcastle Mater Hospital, Newcastle; Alan S. Coates, International Breast Cancer Study Group and University of Sydney, Sydney, New South Wales, Australia; Beat Thürlimann, Breast Center Kantonsspital, St Gallen, and Swiss Group for Clinical Cancer Research; and Monica Castiglione, International Breast Cancer Study Group, Bern, Switzerland
| | - Monica Castiglione
- Marco Colleoni and Aron Goldhirsch, European Institute of Oncology and International Breast Cancer Study Group, Milan; Lorenzo Gianni, Ospedale degli Infermi and Istituto Scientifico Romagnolo per lo Studio e la Cura dei Tumori, Rimini, Italy; Zhuoxin Sun, Karen N. Price, and Richard D. Gelber, International Breast Cancer Study Group Statistical Center and Frontier Science and Technology Research Foundation; Zhuoxin Sun and Richard D. Gelber, Harvard T.F. Chan School of Public Health; Richard D. Gelber, Dana-Farber Cancer Institute and Harvard Medical School, Boston, MA; Per Karlsson, Institute of Selected Clinical Sciences, Sahlgrenska Academy, Sahlgrenska University Hospital, Gothenburg, Sweden; John F. Forbes, Australia and New Zealand Breast Cancer Trials Group, University of Newcastle, Newcastle Mater Hospital, Newcastle; Alan S. Coates, International Breast Cancer Study Group and University of Sydney, Sydney, New South Wales, Australia; Beat Thürlimann, Breast Center Kantonsspital, St Gallen, and Swiss Group for Clinical Cancer Research; and Monica Castiglione, International Breast Cancer Study Group, Bern, Switzerland
| | - Richard D Gelber
- Marco Colleoni and Aron Goldhirsch, European Institute of Oncology and International Breast Cancer Study Group, Milan; Lorenzo Gianni, Ospedale degli Infermi and Istituto Scientifico Romagnolo per lo Studio e la Cura dei Tumori, Rimini, Italy; Zhuoxin Sun, Karen N. Price, and Richard D. Gelber, International Breast Cancer Study Group Statistical Center and Frontier Science and Technology Research Foundation; Zhuoxin Sun and Richard D. Gelber, Harvard T.F. Chan School of Public Health; Richard D. Gelber, Dana-Farber Cancer Institute and Harvard Medical School, Boston, MA; Per Karlsson, Institute of Selected Clinical Sciences, Sahlgrenska Academy, Sahlgrenska University Hospital, Gothenburg, Sweden; John F. Forbes, Australia and New Zealand Breast Cancer Trials Group, University of Newcastle, Newcastle Mater Hospital, Newcastle; Alan S. Coates, International Breast Cancer Study Group and University of Sydney, Sydney, New South Wales, Australia; Beat Thürlimann, Breast Center Kantonsspital, St Gallen, and Swiss Group for Clinical Cancer Research; and Monica Castiglione, International Breast Cancer Study Group, Bern, Switzerland
| | - Alan S Coates
- Marco Colleoni and Aron Goldhirsch, European Institute of Oncology and International Breast Cancer Study Group, Milan; Lorenzo Gianni, Ospedale degli Infermi and Istituto Scientifico Romagnolo per lo Studio e la Cura dei Tumori, Rimini, Italy; Zhuoxin Sun, Karen N. Price, and Richard D. Gelber, International Breast Cancer Study Group Statistical Center and Frontier Science and Technology Research Foundation; Zhuoxin Sun and Richard D. Gelber, Harvard T.F. Chan School of Public Health; Richard D. Gelber, Dana-Farber Cancer Institute and Harvard Medical School, Boston, MA; Per Karlsson, Institute of Selected Clinical Sciences, Sahlgrenska Academy, Sahlgrenska University Hospital, Gothenburg, Sweden; John F. Forbes, Australia and New Zealand Breast Cancer Trials Group, University of Newcastle, Newcastle Mater Hospital, Newcastle; Alan S. Coates, International Breast Cancer Study Group and University of Sydney, Sydney, New South Wales, Australia; Beat Thürlimann, Breast Center Kantonsspital, St Gallen, and Swiss Group for Clinical Cancer Research; and Monica Castiglione, International Breast Cancer Study Group, Bern, Switzerland
| | - Aron Goldhirsch
- Marco Colleoni and Aron Goldhirsch, European Institute of Oncology and International Breast Cancer Study Group, Milan; Lorenzo Gianni, Ospedale degli Infermi and Istituto Scientifico Romagnolo per lo Studio e la Cura dei Tumori, Rimini, Italy; Zhuoxin Sun, Karen N. Price, and Richard D. Gelber, International Breast Cancer Study Group Statistical Center and Frontier Science and Technology Research Foundation; Zhuoxin Sun and Richard D. Gelber, Harvard T.F. Chan School of Public Health; Richard D. Gelber, Dana-Farber Cancer Institute and Harvard Medical School, Boston, MA; Per Karlsson, Institute of Selected Clinical Sciences, Sahlgrenska Academy, Sahlgrenska University Hospital, Gothenburg, Sweden; John F. Forbes, Australia and New Zealand Breast Cancer Trials Group, University of Newcastle, Newcastle Mater Hospital, Newcastle; Alan S. Coates, International Breast Cancer Study Group and University of Sydney, Sydney, New South Wales, Australia; Beat Thürlimann, Breast Center Kantonsspital, St Gallen, and Swiss Group for Clinical Cancer Research; and Monica Castiglione, International Breast Cancer Study Group, Bern, Switzerland
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