1
|
Bartlett JM, Xu K, Wong J, Pond G, Zhang Y, Spears M, Salunga R, Mallon E, Taylor KJ, Hasenburg A, Markopoulos C, Dirix L, van de Velde CJ, Rea D, Schnabel CA, Treuner K, Bayani J. Validation of the Prognostic Performance of Breast Cancer Index in Hormone Receptor-Positive Postmenopausal Breast Cancer Patients in the TEAM Trial. Clin Cancer Res 2024; 30:1509-1517. [PMID: 38345755 PMCID: PMC11016895 DOI: 10.1158/1078-0432.ccr-23-2436] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2023] [Revised: 11/01/2023] [Accepted: 02/08/2024] [Indexed: 04/16/2024]
Abstract
PURPOSE Patients with early-stage hormone receptor-positive (HR+) breast cancer face a prolonged risk of recurrence even after adjuvant endocrine therapy. The Breast Cancer Index (BCI) is significantly prognostic for overall (0-10 years) and late (5-10 years) distant recurrence (DR) risk in N0 and N1 patients. Here, BCI prognostic performance was evaluated in HR+ postmenopausal women from the Tamoxifen and Exemestane Adjuvant Multinational (TEAM) trial. EXPERIMENTAL DESIGN 3,544 patients were included in the analysis (N = 1,519 N0, N = 2,025 N+). BCI risk groups were calculated using pre-specified cutoff points. Kaplan-Meier analyses and log-rank tests were used to assess the prognostic significance of BCI risk groups based on DR. Hazard ratios (HR) and confidence intervals (CI) were calculated using Cox models with and without clinical covariates. RESULTS For overall 10-year DR, BCI was significantly prognostic in Ni0 (N = 1,196) and N1 (N = 1,234) patients who did not receive prior chemotherapy (P < 0.001). In patients who were DR-free for 5 years, 10-year late DR rates for low- and high-risk groups were 5.4% and 9.3% (N0 cohort, N = 1,285) and 4.8% and 12.2% (N1 cohort, N = 1,625) with multivariate HRs of 2.25 (95% CI, 1.30-3.88; P = 0.004) and 2.67 (95% CI, 1.53-4.63; P < 0.001), respectively. Late DR performance was substantially improved using previously optimized cutoff points, identifying BCI low-risk groups with even lower 10-year late DR rates of 3.8% and 2.7% in N0 and N1 patients, respectively. CONCLUSIONS The TEAM trial represents the largest prognostic validation study for BCI to date and provides a more representative assessment of late DR risk to guide individualized treatment decision-making for HR+ patients with early-stage breast cancer.
Collapse
Affiliation(s)
- John M.S. Bartlett
- Cancer Research UK Scotland Centre, University of Edinburgh, Edinburgh, United Kingdom
| | - Keying Xu
- Diagnostic Development, Ontario Institute for Cancer Research, Toronto, Ontario, Canada
| | - Jenna Wong
- Biotheranostics, A Hologic Company, San Diego, California
| | - Gregory Pond
- Department of Biostatistics, McMaster University, Hamilton, Ontario
| | - Yi Zhang
- Biotheranostics, A Hologic Company, San Diego, California
| | - Melanie Spears
- Diagnostic Development, Ontario Institute for Cancer Research, Toronto, Ontario, Canada
- Department of Laboratory Medicine and Pathobiology, University of Toronto, Toronto, Ontario
| | | | | | - Karen J. Taylor
- Cancer Research UK Scotland Centre, University of Edinburgh, Edinburgh, United Kingdom
| | - Annette Hasenburg
- Department of Gynecology and Obstetrics, University Center Mainz, Mainz, Germany
| | | | - Luc Dirix
- St. Augustinus Hospital, Antwerp, Belgium
| | | | - Daniel Rea
- Cancer Research UK Clinical Trials Unit, University of Birmingham, Birmingham, United Kingdom
| | | | - Kai Treuner
- Biotheranostics, A Hologic Company, San Diego, California
| | - Jane Bayani
- Diagnostic Development, Ontario Institute for Cancer Research, Toronto, Ontario, Canada
- Department of Laboratory Medicine and Pathobiology, University of Toronto, Toronto, Ontario
| |
Collapse
|
2
|
Higgins MJ, Liedke PE, Goss PE. Extended adjuvant endocrine therapy in hormone dependent breast cancer: the paradigm of the NCIC-CTG MA.17/BIG 1-97 trial. Crit Rev Oncol Hematol 2013; 86:23-32. [PMID: 23116626 DOI: 10.1016/j.critrevonc.2012.09.013] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2012] [Revised: 08/28/2012] [Accepted: 09/26/2012] [Indexed: 11/21/2022] Open
Abstract
Early hormone-receptor-positive breast cancer is a chronic relapsing disease that can remain clinically silent for many years. The NCIC-CTG MA.17/BIG 1-97 trial randomized disease-free early breast cancer patients who had received five years of adjuvant tamoxifen to either letrozole or placebo and was the first to demonstrate a benefit with extended endocrine therapy. MA.17/BIG 1-97 was stopped at the first interim analysis because disease free survival was strongly prolonged in the letrozole arm. Subsequent subset analyses and longer follow up have shown that this therapy improved survival across all groups, particularly among women with node-positive disease and those that were pre-menopausal at time of study enrolment. The MA.17/BIG 1-97 study should be considered a paradigm for extended adjuvant endocrine therapy in hormone-receptor-positive early breast cancer.
Collapse
|