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Xu P, Luo W, Hu J, Ma X, Hao Q, Hui W, Zhou Z, Lin S, Wang M, Wu H, Dai Z, Kang H. Favorable outcome of neoadjuvant endocrine treatment than surgery-first in female HR-positive/HER2-negative breast cancer patients-A NCDB analysis (2010-2016). Cancer Med 2024; 13:e7244. [PMID: 38859692 PMCID: PMC11165171 DOI: 10.1002/cam4.7244] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2023] [Revised: 03/03/2024] [Accepted: 04/27/2024] [Indexed: 06/12/2024] Open
Abstract
PURPOSE To assess the efficacy of neoadjuvant endocrine therapy in female HR-positive/HER2-negative breast cancer patients. DATA AND METHODS We identified female patients aged ≥18 years with cT1-4N0-XM0, HR(+), and HER2(-) breast cancer from the National Cancer Database. The patients who underwent surgery first were categorized as "surgery-first," while those who received NET before surgery were classified as "NET." Propensity score-matching, Cox proportional-hazard model, variance inflation factors, and interaction analysis were employed to estimate the correlation between NET and survival outcomes. RESULTS Among 432,387 cases, 2914 NET patients and 2914 surgery-first patients were matched. Compared with the surgery-first group, the NET group received less adjuvant chemotherapy (p < 0.001). Furthermore, the NET group exhibited higher survival probabilities compared with the surgery-first group (3 years: 91.4% vs. 82.1%; 5 years: 82.1% vs. 66.8%). Multivariate Cox analysis indicated that NET was associated with improved OS (surgery-first vs. NET: HR 2.17, 95% CI: 1.93-2.44). Age over 55 years old, having public insurance, higher CDCC score, higher NSBR grade, ER(+)PR(-), and advanced clinical stage were related to worse OS (all p < 0.05). There was an interaction between age, race, income, and home and treatment regimen (all p < 0.05). CONCLUSION NET may be a more effective treatment procedure than surgery-first in female HR-positive/HER2-negative, non-metastatic breast cancer patients. Future clinical studies with more detailed data will provide higher-level evidence-based data.
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Affiliation(s)
- Peng Xu
- The Comprehensive Breast Care CenterThe Second Affiliated Hospital of Xi'an Jiaotong UniversityXi'anShaanxiChina
| | - Wen Luo
- The Comprehensive Breast Care CenterThe Second Affiliated Hospital of Xi'an Jiaotong UniversityXi'anShaanxiChina
| | - Jingjing Hu
- Massachusetts General Cancer CenterBostonMassachusettsUSA
| | - Xiaobin Ma
- The Comprehensive Breast Care CenterThe Second Affiliated Hospital of Xi'an Jiaotong UniversityXi'anShaanxiChina
| | - Qian Hao
- The Comprehensive Breast Care CenterThe Second Affiliated Hospital of Xi'an Jiaotong UniversityXi'anShaanxiChina
| | - Wentao Hui
- The Comprehensive Breast Care CenterThe Second Affiliated Hospital of Xi'an Jiaotong UniversityXi'anShaanxiChina
| | - Zhangjian Zhou
- The Comprehensive Breast Care CenterThe Second Affiliated Hospital of Xi'an Jiaotong UniversityXi'anShaanxiChina
| | - Shuai Lin
- The Comprehensive Breast Care CenterThe Second Affiliated Hospital of Xi'an Jiaotong UniversityXi'anShaanxiChina
| | - Meng Wang
- The Comprehensive Breast Care CenterThe Second Affiliated Hospital of Xi'an Jiaotong UniversityXi'anShaanxiChina
| | - Hao Wu
- Department of Biophysics, School of Basic Medical Sciences, Key Laboratory of Environment and Genes Related to DiseasesXi'an Jiaotong University Health Science CenterXi'anShaanxiChina
| | - Zhijun Dai
- Department of Breast SurgeryThe First Affiliated Hospital, College of Medicine, Zhejiang UniversityHangzhouChina
| | - Huafeng Kang
- The Comprehensive Breast Care CenterThe Second Affiliated Hospital of Xi'an Jiaotong UniversityXi'anShaanxiChina
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Malmgren JA, Guo B, Atwood MK, Hallam P, Roberts LA, Kaplan HG. COVID-19 related change in breast cancer diagnosis, stage, treatment, and case volume: 2019-2021. Breast Cancer Res Treat 2023; 202:105-115. [PMID: 37584882 PMCID: PMC10504101 DOI: 10.1007/s10549-023-06962-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2023] [Accepted: 04/26/2023] [Indexed: 08/17/2023]
Abstract
PURPOSE Evaluate the COVID-19 pandemic impact on breast cancer detection method, stage and treatment before, during and after health care restrictions. METHODS In a retrospective tertiary cancer care center cohort, first primary breast cancer (BC) patients, years 2019-2021, were reviewed (n = 1787). Chi-square statistical comparisons of detection method (patient (PtD)/mammography (MamD), Stage (0-IV) and treatment by pre-pandemic time 1: 2019 + Q1 2020; peak-pandemic time 2: Q2-Q4 2020; pandemic time 3: Q1-Q4 2021 (Q = quarter) periods and logistic regression for odds ratios were used. RESULTS BC case volume decreased 22% in 2020 (N = 533) (p = .001). MamD declined from 64% pre-pandemic to 58% peak-pandemic, and increased to 71% in 2021 (p < .001). PtD increased from 30 to 36% peak-pandemic and declined to 25% in 2021 (p < .001). Diagnosis of Stage 0/I BC declined peak-pandemic when screening mammography was curtailed due to lock-down mandates but rebounded above pre-pandemic levels in 2021. In adjusted regression, peak-pandemic stage 0/I BC diagnosis decreased 24% (OR = 0.76, 95% CI: 0.60, 0.96, p = .021) and increased 34% in 2021 (OR = 1.34, 95% CI: 1.06, 1.70, p = .014). Peak-pandemic neoadjuvant therapy increased from 33 to 38% (p < .001), primarily for surgical delay cases. CONCLUSIONS The COVID-19 pandemic restricted health-care access, reduced mammography screening and created surgical delays. During the peak-pandemic time, due to restricted or no access to mammography screening, we observed a decrease in stage 0/I BC by number and proportion. Continued low case numbers represent a need to re-establish screening behavior and staffing.
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Affiliation(s)
- Judith A Malmgren
- HealthStat Consulting, Inc, 12025 9th Ave NW, Seattle, WA, 98177, USA.
- School of Public Health, University of Washington, Seattle, WA, USA.
| | - Boya Guo
- School of Public Health, University of Washington, Seattle, WA, USA
| | - Mary K Atwood
- Swedish Cancer Institute, 1221 Madison St, Seattle, WA, 98104, USA
| | - Paula Hallam
- Swedish Cancer Institute, 1221 Madison St, Seattle, WA, 98104, USA
| | - Laura A Roberts
- Swedish Cancer Institute, 1221 Madison St, Seattle, WA, 98104, USA
| | - Henry G Kaplan
- Swedish Cancer Institute, 1221 Madison St, Seattle, WA, 98104, USA
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Murillo OD, Petrosyan V, LaPlante EL, Dobrolecki LE, Lewis MT, Milosavljevic A. Deconvolution of cancer cell states by the XDec-SM method. PLoS Comput Biol 2023; 19:e1011365. [PMID: 37578979 PMCID: PMC10449115 DOI: 10.1371/journal.pcbi.1011365] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2023] [Revised: 08/24/2023] [Accepted: 07/17/2023] [Indexed: 08/16/2023] Open
Abstract
Proper characterization of cancer cell states within the tumor microenvironment is a key to accurately identifying matching experimental models and the development of precision therapies. To reconstruct this information from bulk RNA-seq profiles, we developed the XDec Simplex Mapping (XDec-SM) reference-optional deconvolution method that maps tumors and the states of constituent cells onto a biologically interpretable low-dimensional space. The method identifies gene sets informative for deconvolution from relevant single-cell profiling data when such profiles are available. When applied to breast tumors in The Cancer Genome Atlas (TCGA), XDec-SM infers the identity of constituent cell types and their proportions. XDec-SM also infers cancer cells states within individual tumors that associate with DNA methylation patterns, driver somatic mutations, pathway activation and metabolic coupling between stromal and breast cancer cells. By projecting tumors, cancer cell lines, and PDX models onto the same map, we identify in vitro and in vivo models with matching cancer cell states. Map position is also predictive of therapy response, thus opening the prospects for precision therapy informed by experiments in model systems matched to tumors in vivo by cancer cell state.
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Affiliation(s)
- Oscar D. Murillo
- Translational Science and Therapeutics Division, Fred Hutchinson Cancer Center, Seattle, Washington, United States of America
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, Texas, United States of America
| | - Varduhi Petrosyan
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, Texas, United States of America
| | - Emily L. LaPlante
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, Texas, United States of America
| | - Lacey E. Dobrolecki
- Lester and Sue Smith Breast Center, Baylor College of Medicine, Houston, Texas, United States of America
| | - Michael T. Lewis
- Lester and Sue Smith Breast Center, Baylor College of Medicine, Houston, Texas, United States of America
- Dan L Duncan Comprehensive Cancer Center, Baylor College of Medicine, Houston, Texas, United States of America
- Departments of Molecular and Cellular Biology and Radiology, Baylor College of Medicine, Houston, Texas, United States of America
| | - Aleksandar Milosavljevic
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, Texas, United States of America
- Dan L Duncan Comprehensive Cancer Center, Baylor College of Medicine, Houston, Texas, United States of America
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Haribhai S, Bhatia K, Shahmanesh M. Global elective breast- and colorectal cancer surgery performance backlogs, attributable mortality and implemented health system responses during the COVID-19 pandemic: A scoping review. PLOS GLOBAL PUBLIC HEALTH 2023; 3:e0001413. [PMID: 37014874 PMCID: PMC10072489 DOI: 10.1371/journal.pgph.0001413] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/28/2022] [Accepted: 03/07/2023] [Indexed: 04/05/2023]
Abstract
Globally, 28.4 million non-emergent ('elective') surgical procedures have been deferred during the COVID-19 pandemic. This study evaluated the impact of the COVID-19 pandemic on elective breast- or colorectal cancer (CRC) procedure backlogs and attributable mortality, globally. Further, we evaluated the interaction between procedure deferrals and health systems, internationally. Relevant articles from any country, published between December 2019-24 November 2022, were identified through searches of online databases (MEDLINE, EMBASE) and by examining the reference lists of retrieved articles. We organised health system-related findings thematically per the Structures-Processes-Outcomes conceptual model by Donabedian (1966). Of 337 identified articles, we included 50. Eleven (22.0%) were reviews. The majority of included studies originated from high-income countries (n = 38, 76.0%). An ecological, modelling study elucidated that global 12-week procedure cancellation rates ranged from 68.3%-73%; Europe and Central Asia accounted for the majority of cancellations (n = 8,430,348) and sub-Saharan Africa contributed the least (n = 520,459). The percentage reduction in global, institutional elective breast cancer surgery activity ranged from 5.68%-16.5%. For CRC, this ranged from 0%-70.9%. Significant evidence is presented on how insufficient pandemic preparedness necessitated procedure deferrals, internationally. We also outlined ancillary determinants of delayed surgery (e.g., patient-specific factors). The following global health system response themes are presented: Structural changes (i.e., hospital re-organisation), Process-related changes (i.e., adapted healthcare provision) and the utilisation of Outcomes (i.e., SARS-CoV-2 infection incidence among patients or healthcare personnel, postoperative pulmonary complication incidence, hospital readmission, length of hospital stay and tumour staging) as indicators of health system response efficacy. Evidence on procedure backlogs and attributable mortality was limited, partly due to insufficient, real-time surveillance of cancer outcomes, internationally. Elective surgery activity has decreased and cancer services have adapted rapidly, worldwide. Further research is needed to understand the impact of COVID-19 on cancer mortality and the efficacy of health system mitigation measures, globally.
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Affiliation(s)
- Sonia Haribhai
- Institute for Global Health, University College London, London, United Kingdom
- Africa Health Research Institute, Durban, South Africa
| | - Komal Bhatia
- Institute for Global Health, University College London, London, United Kingdom
| | - Maryam Shahmanesh
- Institute for Global Health, University College London, London, United Kingdom
- Africa Health Research Institute, Durban, South Africa
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5
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The Effects of the COVID-19 Pandemic on Mastectomy Outcomes for Breast Cancer. Clin Breast Cancer 2023; 23:431-435. [PMID: 36990842 PMCID: PMC9951028 DOI: 10.1016/j.clbc.2023.02.010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2022] [Revised: 02/17/2023] [Accepted: 02/19/2023] [Indexed: 03/29/2023]
Abstract
Background Single center studies have shown that during the Coronavirus Disease 2019 (COVID-19) pandemic, many patients had surgical procedures postponed or modified. We studied how the pandemic affected the clinical outcomes of breast cancer patients who underwent mastectomies in 2020. Methods Using the American College of Surgeons (ACS) National Surgical Quality Improvement Program (NSQIP) database, we compared clinical variables of 31,123 and 28,680 breast cancer patients who underwent a mastectomy in 2019 and 2020, respectively. Data from 2019 served as the control, and data from 2020 represented the COVID-19 cohort. Results Fewer surgeries of all kinds were performed in the COVID-19 year than in the control (902,968 vs. 1,076,411). The proportion of mastectomies performed in the COVID-19 cohort was greater than in the control year (3.18% vs. 2.89%, <0.001). More patients presented with ASA level 3 in the COVID-19 year vs. the control (P < .002). Additionally, the proportion of patients with disseminated cancer was lower during the COVID-19 year (P < .001). Average hospital length of stay (P < .001) and time from operation to discharge were shorter in the COVID vs. control cohort (P < .001). Fewer unplanned readmissions were seen in the COVID year (P < .004). Conclusion The ongoing surgical services and mastectomies for breast cancer during the pandemic produced similar clinical outcomes to those seen in 2019. Prioritization of resources for sicker patients and the use of alternative interventions produced similar results for breast cancer patients who underwent a mastectomy in 2020.
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Martínez-Pérez C, Turnbull AK, Kay C, Dixon JM. Neoadjuvant endocrine therapy in postmenopausal women with HR+/HER2- breast cancer. Expert Rev Anticancer Ther 2023; 23:67-86. [PMID: 36633402 DOI: 10.1080/14737140.2023.2162043] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2022] [Accepted: 12/20/2022] [Indexed: 01/13/2023]
Abstract
INTRODUCTION While endocrine therapy is the standard-of-care adjuvant treatment for hormone receptor-positive (HR+) breast cancers, there is also extensive evidence for the role of pre-operative (or neoadjuvant) endocrine therapy (NET) in HR+ postmenopausal women. AREAS COVERED We conducted a thorough review of the published literature, to summarize the evidence to date, including studies of how NET compares to neoadjuvant chemotherapy, which NET agents are preferable, and the optimal duration of NET. We describe the importance of on-treatment assessment of response, the different predictors available (including Ki67, PEPI score, and molecular signatures) and the research opportunities the pre-operative setting offers. We also summarize recent combination trials and discuss how the COVID-19 pandemic led to increases in NET use for safe management of cases with deferred surgery and adjuvant treatments. EXPERT OPINION NET represents a safe and effective tool for the management of postmenopausal women with HR+/HER2- breast cancer, enabling disease downstaging and a wider range of surgical options. Aromatase inhibitors are the preferred NET, with evidence suggesting that longer regimens might yield optimal results. However, NET remains currently underutilised in many territories and institutions. Further validation of predictors for treatment response and benefit is needed to help standardise and fully exploit the potential of NET in the clinic.
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Affiliation(s)
- Carlos Martínez-Pérez
- Translational Oncology Research Group, MRC Institute of Genetics and Cancer, University of Edinburgh, Edinburgh, Scotland
- Edinburgh Breast Cancer Now Research Team, MRC Institute of Genetics and Cancer, University of Edinburgh, Edinburgh, Scotland
| | - Arran K Turnbull
- Translational Oncology Research Group, MRC Institute of Genetics and Cancer, University of Edinburgh, Edinburgh, Scotland
- Edinburgh Breast Cancer Now Research Team, MRC Institute of Genetics and Cancer, University of Edinburgh, Edinburgh, Scotland
| | - Charlene Kay
- Translational Oncology Research Group, MRC Institute of Genetics and Cancer, University of Edinburgh, Edinburgh, Scotland
- Edinburgh Breast Cancer Now Research Team, MRC Institute of Genetics and Cancer, University of Edinburgh, Edinburgh, Scotland
| | - J Michael Dixon
- Translational Oncology Research Group, MRC Institute of Genetics and Cancer, University of Edinburgh, Edinburgh, Scotland
- Edinburgh Breast Cancer Now Research Team, MRC Institute of Genetics and Cancer, University of Edinburgh, Edinburgh, Scotland
- Edinburgh Breast Unit, Western General Hospital, Edinburgh, Scotland
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7
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Stipp MC, Corso CR, Acco A. Impacts of COVID-19 in Breast Cancer: From Molecular Mechanism to the Treatment Approach. Curr Pharm Biotechnol 2023; 24:238-252. [PMID: 35593354 DOI: 10.2174/1389201023666220421133311] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2021] [Revised: 12/17/2021] [Accepted: 03/03/2022] [Indexed: 11/22/2022]
Abstract
Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) has already infected more than 272 million people, resulting in 5.3 million deaths worldwide from COVID-19. Breast tumors are considered the world's most commonly diagnosed cancer. Both breast cancer and COVID-19 share common pathogenic features, represented by inflammatory mediators and the potential of SARS-CoV-2 replication in metastatic cancer cells. This may intensify viral load in patients, thereby triggering severe COVID-19 complications. Thus, cancer patients have a high risk of developing severe COVID-19 with SARS-CoV-2 infection and a higher rate of complications and death than non-cancer patients. The present review discusses common mechanisms between COVID-19 and breast cancer and the particular susceptibility to COVID-19 in breast cancer patients. We describe the effects of chemotherapeutic agents that are used against this cancer, which should be considered from the perspective of susceptibility to SARS-CoV-2 infection and risk of developing severe events. We also present potential drug interactions between chemotherapies that are used to treat breast cancer and drugs that are applied for COVID-19. The drugs that are identified as having the most interactions are doxorubicin and azithromycin. Both drugs can interact with each other and with other drugs, which likely requires additional drug monitoring and changes in drug dosage and timing of administration. Further clinical and observational studies involving breast cancer patients who acquire COVID-19 are needed to define the best therapeutic approach when considering the course of both diseases.
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Affiliation(s)
- Maria Carolina Stipp
- Department of Pharmacology, Federal University of Paraná (UFPR), Curitiba, Brazil
| | | | - Alexandra Acco
- Department of Pharmacology, Federal University of Paraná (UFPR), Curitiba, Brazil
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Martí C, Yébenes L, Oliver JM, Moreno E, Frías L, Berjón A, Loayza A, Meléndez M, Roca MJ, Córdoba V, Hardisson D, Rodríguez MÁ, Sánchez-Méndez JI. The Clinical Impact of Neoadjuvant Endocrine Treatment on Luminal-like Breast Cancers and Its Prognostic Significance: Results from a Single-Institution Prospective Cohort Study. Curr Oncol 2022; 29:2199-2210. [PMID: 35448153 PMCID: PMC9026529 DOI: 10.3390/curroncol29040179] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2022] [Revised: 03/15/2022] [Accepted: 03/21/2022] [Indexed: 01/02/2023] Open
Abstract
Purpose: Neoadjuvant endocrine treatment (NET) has become a useful tool for the downstaging of luminal-like breast cancers in postmenopausal patients. It enables us to increase breast- conserving surgery (BCS) rates, provides an opportunity for us to assess in vivo NET effectiveness, and allows us to study any biological changes that may act as valid biomarkers. The purpose of this study was to evaluate the safety and effectiveness of NET, and to assess the role of Ki67 proliferation rate changes as an indicator of endocrine responsiveness. Methods: From 2016 to 2020, a single-institution cohort of patients, treated with NET and further surgery, was evaluated. In patients with Ki67 ≥ 10%, a second core biopsy was performed after four weeks. Information regarding histopathological and clinical changes was gathered. Results: A total of 115 estrogen receptor-positive (ER+)/HER2-negative patients were included. The median treatment duration was 5.0 months (IQR: 2.0−6.0). The median maximum size in the surgical sample was 40% smaller than the pretreatment size measured by ultrasound (p < 0.0001). The median pretreatment Ki67 expression was 20.0% (IQR: 12.0−30.0), and was reduced to 5.0% (IQR: 1.8−10.0) after four weeks, and to 2.0% (IQR: 1.0−8.0) in the surgical sample (p < 0.0001). BCS was performed on 98 patients (85.2%). No pathological complete responses were recorded. A larger Ki67 fold change after four weeks was significantly related to a PEPI score of zero (p < 0.002). No differences were observed between luminal A- and B-like tumors, with regard to fold change and PEPI score. Conclusions: In our cohort, NET was proven to be effective for tumor size and Ki67 downstaging. This resulted in a higher rate of conservative surgery, aided in therapeutic decision making, provided prognostic information, and constituted a safe and well-tolerated approach.
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Affiliation(s)
- Covadonga Martí
- Breast Cancer Unit, Hospital Universitario La Paz, 28046 Madrid, Spain; (L.Y.); (J.M.O.); (E.M.); (L.F.); (A.B.); (A.L.); (M.M.); (M.J.R.); (V.C.); (D.H.); (M.Á.R.); (J.I.S.-M.)
- Department of Gynecology, Hospital Universitario La Paz, 28046 Madrid, Spain
- Correspondence:
| | - Laura Yébenes
- Breast Cancer Unit, Hospital Universitario La Paz, 28046 Madrid, Spain; (L.Y.); (J.M.O.); (E.M.); (L.F.); (A.B.); (A.L.); (M.M.); (M.J.R.); (V.C.); (D.H.); (M.Á.R.); (J.I.S.-M.)
- Department of Pathology, Hospital Universitario La Paz, 28046 Madrid, Spain
- IdiPaz—Instituto de Investigación La Paz, 28046 Madrid, Spain
| | - José María Oliver
- Breast Cancer Unit, Hospital Universitario La Paz, 28046 Madrid, Spain; (L.Y.); (J.M.O.); (E.M.); (L.F.); (A.B.); (A.L.); (M.M.); (M.J.R.); (V.C.); (D.H.); (M.Á.R.); (J.I.S.-M.)
- Department of Radiology, Hospital Universitario La Paz, 28046 Madrid, Spain
| | - Elisa Moreno
- Breast Cancer Unit, Hospital Universitario La Paz, 28046 Madrid, Spain; (L.Y.); (J.M.O.); (E.M.); (L.F.); (A.B.); (A.L.); (M.M.); (M.J.R.); (V.C.); (D.H.); (M.Á.R.); (J.I.S.-M.)
- Department of Gynecology, Hospital Universitario La Paz, 28046 Madrid, Spain
| | - Laura Frías
- Breast Cancer Unit, Hospital Universitario La Paz, 28046 Madrid, Spain; (L.Y.); (J.M.O.); (E.M.); (L.F.); (A.B.); (A.L.); (M.M.); (M.J.R.); (V.C.); (D.H.); (M.Á.R.); (J.I.S.-M.)
- Department of Gynecology, Hospital Universitario La Paz, 28046 Madrid, Spain
| | - Alberto Berjón
- Breast Cancer Unit, Hospital Universitario La Paz, 28046 Madrid, Spain; (L.Y.); (J.M.O.); (E.M.); (L.F.); (A.B.); (A.L.); (M.M.); (M.J.R.); (V.C.); (D.H.); (M.Á.R.); (J.I.S.-M.)
- Department of Pathology, Hospital Universitario La Paz, 28046 Madrid, Spain
- IdiPaz—Instituto de Investigación La Paz, 28046 Madrid, Spain
| | - Adolfo Loayza
- Breast Cancer Unit, Hospital Universitario La Paz, 28046 Madrid, Spain; (L.Y.); (J.M.O.); (E.M.); (L.F.); (A.B.); (A.L.); (M.M.); (M.J.R.); (V.C.); (D.H.); (M.Á.R.); (J.I.S.-M.)
- Department of Gynecology, Hospital Universitario La Paz, 28046 Madrid, Spain
| | - Marcos Meléndez
- Breast Cancer Unit, Hospital Universitario La Paz, 28046 Madrid, Spain; (L.Y.); (J.M.O.); (E.M.); (L.F.); (A.B.); (A.L.); (M.M.); (M.J.R.); (V.C.); (D.H.); (M.Á.R.); (J.I.S.-M.)
- Department of Gynecology, Hospital Universitario La Paz, 28046 Madrid, Spain
| | - María José Roca
- Breast Cancer Unit, Hospital Universitario La Paz, 28046 Madrid, Spain; (L.Y.); (J.M.O.); (E.M.); (L.F.); (A.B.); (A.L.); (M.M.); (M.J.R.); (V.C.); (D.H.); (M.Á.R.); (J.I.S.-M.)
- Department of Radiology, Hospital Universitario La Paz, 28046 Madrid, Spain
| | - Vicenta Córdoba
- Breast Cancer Unit, Hospital Universitario La Paz, 28046 Madrid, Spain; (L.Y.); (J.M.O.); (E.M.); (L.F.); (A.B.); (A.L.); (M.M.); (M.J.R.); (V.C.); (D.H.); (M.Á.R.); (J.I.S.-M.)
- Department of Radiology, Hospital Universitario La Paz, 28046 Madrid, Spain
| | - David Hardisson
- Breast Cancer Unit, Hospital Universitario La Paz, 28046 Madrid, Spain; (L.Y.); (J.M.O.); (E.M.); (L.F.); (A.B.); (A.L.); (M.M.); (M.J.R.); (V.C.); (D.H.); (M.Á.R.); (J.I.S.-M.)
- Department of Pathology, Hospital Universitario La Paz, 28046 Madrid, Spain
- IdiPaz—Instituto de Investigación La Paz, 28046 Madrid, Spain
- Faculty of Medicine, Universidad Autónoma de Madrid, 28046 Madrid, Spain
- Center for Biomedical Research in the Cancer Network (CIBERONC), 28029 Madrid, Spain
| | - María Ángeles Rodríguez
- Breast Cancer Unit, Hospital Universitario La Paz, 28046 Madrid, Spain; (L.Y.); (J.M.O.); (E.M.); (L.F.); (A.B.); (A.L.); (M.M.); (M.J.R.); (V.C.); (D.H.); (M.Á.R.); (J.I.S.-M.)
| | - José Ignacio Sánchez-Méndez
- Breast Cancer Unit, Hospital Universitario La Paz, 28046 Madrid, Spain; (L.Y.); (J.M.O.); (E.M.); (L.F.); (A.B.); (A.L.); (M.M.); (M.J.R.); (V.C.); (D.H.); (M.Á.R.); (J.I.S.-M.)
- Department of Gynecology, Hospital Universitario La Paz, 28046 Madrid, Spain
- IdiPaz—Instituto de Investigación La Paz, 28046 Madrid, Spain
- Faculty of Medicine, Universidad Autónoma de Madrid, 28046 Madrid, Spain
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Defer surgery in operable breast cancer: how long is too long? Breast Cancer 2021; 29:224-233. [PMID: 34661820 PMCID: PMC8522256 DOI: 10.1007/s12282-021-01302-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2021] [Accepted: 09/28/2021] [Indexed: 11/15/2022]
Abstract
Purpose The aim of this meta-analysis was to evaluate outcomes of surgery compared to primary endocrine therapy (PET) in patients with non-advanced, operable invasive breast cancer, and to determine if PET as initial therapy may safely postpone surgery. Methods The MEDLINE, EMBASE, PubMed, and Cochrane Library were searched from database inception to July 2020 to identify eligible studies. Inclusion criteria were experimental or observational studies with at least one arm treated with PET and a second arm treated with surgery with or without PET. Local recurrence or progression of disease was defined as either failure of non-operative management (tumor failing to decrease in size and/or continuous local or distant tumor growth) or relapse of breast tumor after tumor downsizing following PET. Effect estimates were expressed in hazard ratio and 95% confidence intervals (HR (95% CI)). Results The analysis included six studies with 1499 unique patients. The median time to local progression of disease was 2.3 years. Patients treated with PET alone without surgery had a higher risk of local recurrence and or progression [HR (95% CI): 1.76 (1.33, 2.31); I2 = 84%; p < 0.001]. Patients treated with PET had more favorable outcomes in terms of overall survival [HR (95% CI): 1.24 (1.06, 1.46); I2 = 70%; p = 0.008] and less favorable outcomes in breast cancer-specific survival [HR (95% CI): 1.13 (0.98, 1.31); I2 = 41%; p = 0.10]. The risk of publication bias was assessed to be high in reporting local recurrence rates and low in reporting distant recurrence rates. Conclusion PET alone is inferior to surgery in the treatment of operable invasive breast cancer. However, it may be acceptable to postpone curative breast cancer surgery without risk of progression for 1.1 years or longer. Supplementary Information The online version contains supplementary material available at 10.1007/s12282-021-01302-4.
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10
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Kronenfeld JP, Collier AL, Choi S, Perez-Sanchez D, Shah AM, Lee C, Goel N. Surgical oncology operative experience at a high-volume safety-net hospital during the COVID-19 pandemic. J Surg Oncol 2021; 124:983-988. [PMID: 34291824 PMCID: PMC8426825 DOI: 10.1002/jso.26616] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2021] [Revised: 07/08/2021] [Accepted: 07/10/2021] [Indexed: 01/09/2023]
Abstract
BACKGROUND The coronavirus (COVID-19) pandemic led to disruptions in operative and hospital capabilities as the country triaged resources and canceled elective procedures. This study details the operative experience of a safety-net hospital for cancer-related operations during a 3-month period at the height of the pandemic. METHODS Patients operated on for or diagnosed with malignancies of the abdomen, breast, skin, or soft-tissue (September 3, 2020-September 6, 2020) were identified from operative/clinic schedules. Sociodemographics, tumor and treatment characteristics, and COVID-19 information was identified through retrospective chart review of a prospectively maintained database. Descriptive statistics were calculated. RESULTS Fifty patients evaluated within this window underwent oncologic surgery. Median age was 61 (interquartile range: 53-68), 56% were female, 86% were White, and 66% were Hispanic. The majority (28%) were for colon cancer. Only two patients tested positive for COVID-19 preoperatively or within 30 days of their operation. There were no mortalities during the 1-year study period. CONCLUSION During the COVID-19 pandemic, many hospitals and operative centers limited interventions to preserve resources, but oncologic procedures continued at many large-volume academic cancer centers. This study underscores the importance of continuing to offer surgery during the pandemic for surgical oncology cases at safety-net hospitals to minimize delays in time-sensitive oncologic treatment.
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Affiliation(s)
- Joshua P Kronenfeld
- Division of Surgical Oncology, Department of Surgery, University of Miami Miller School of Medicine, Miami, Florida, USA
| | - Amber L Collier
- Division of Surgical Oncology, Department of Surgery, University of Miami Miller School of Medicine, Miami, Florida, USA
| | - Seraphina Choi
- Division of Surgical Oncology, Department of Surgery, University of Miami Miller School of Medicine, Miami, Florida, USA
| | - Dayana Perez-Sanchez
- Division of Surgical Oncology, Department of Surgery, University of Miami Miller School of Medicine, Miami, Florida, USA
| | - Ankit M Shah
- Division of Surgical Oncology, Department of Surgery, University of Miami Miller School of Medicine, Miami, Florida, USA
| | - Christina Lee
- Division of Surgical Oncology, Department of Surgery, University of Miami Miller School of Medicine, Miami, Florida, USA
| | - Neha Goel
- Division of Surgical Oncology, Department of Surgery, University of Miami Miller School of Medicine, Miami, Florida, USA
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11
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Goldbach MM, Burkbauer L, Bharani T, Williams AD, Keele L, Rothman J, Jankowitz R, Tchou JC. Effectiveness of a Short Duration of Neoadjuvant Endocrine Therapy in Patients with HR+ Breast Cancer-An NCDB Analysis (2004-2016). Ann Surg Oncol 2021; 28:8651-8662. [PMID: 34125350 PMCID: PMC8202052 DOI: 10.1245/s10434-021-10287-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2021] [Accepted: 05/28/2021] [Indexed: 12/14/2022]
Abstract
Background National medical/surgical organizations have recommended the use of neoadjuvant endocrine therapy (NET) to bridge surgery delay of weeks to months for patients with hormone receptor positive (HR+) breast cancer during the ongoing coronavirus disease 2019 (COVID-19) pandemic. The effects of NET of varying durations on pathologic response are unclear. Using the National Cancer Database (NCDB), we evaluated objective response to short (< 9 weeks), moderate (9–27 weeks), and long (> 27 weeks) duration of NET. Patients and Methods The study cohort included female patients diagnosed with nonmetastatic invasive HR+ breast cancer, stratifying by those who received NET versus no NET between 2004 and 2016. Pathologic response was grouped into four categories (complete, downstaged, stable, upstaged) by comparing clinical and pathologic staging data. Objective response to NET included complete, downstaged, and stable pathologic response. Clinical characteristics were compared using χ2 and analysis of variance (ANOVA) tests. Multivariable logistic regression was used to determine factors associated with NET use and objective response according to NET duration. Results A minority (1.2%) received NET in our cohort. Factors associated with NET use included older age, non-Black patients, more advanced clinical stage, higher comorbidity score, government insurance, and lobular histology. Objective response rate (ORR) was 56.7%, 52.1%, and 49.0% after short, moderate, and long NET duration, respectively. Conclusion Short NET duration did not result in an inferior ORR. Future study to evaluate the interaction between surgery delay and NET use on clinical outcome will provide insights into the safety of NET to bridge potential surgery delay in patients with HR+ breast cancer. Supplementary Information The online version contains supplementary material available at 10.1245/s10434-021-10287-5.
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Affiliation(s)
- Macy M Goldbach
- Division of Endocrine and Oncologic Surgery, Department of Surgery, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA.
| | - Laura Burkbauer
- Division of Endocrine and Oncologic Surgery, Department of Surgery, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA
| | - Tina Bharani
- Division of Endocrine and Oncologic Surgery, Department of Surgery, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA
| | | | - Luke Keele
- Division of Epidemiology and Biostatistics, Department of Surgery, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA
| | - Jami Rothman
- Division of Endocrine and Oncologic Surgery, Department of Surgery, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA.,Rena Rowan Breast Center, Abramson Cancer Center, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA
| | - Rachel Jankowitz
- Rena Rowan Breast Center, Abramson Cancer Center, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA
| | - Julia C Tchou
- Division of Endocrine and Oncologic Surgery, Department of Surgery, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA. .,Rena Rowan Breast Center, Abramson Cancer Center, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA.
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12
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The Present and Future of Neoadjuvant Endocrine Therapy for Breast Cancer Treatment. Cancers (Basel) 2021; 13:cancers13112538. [PMID: 34064183 PMCID: PMC8196711 DOI: 10.3390/cancers13112538] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2021] [Revised: 05/16/2021] [Accepted: 05/19/2021] [Indexed: 12/15/2022] Open
Abstract
Simple Summary The treatment of breast cancer has evolved considerably over the last two decades, leading toward individualized disease management. Hormone-sensitive breast cancers constitute the vast majority of cases and endocrine therapy is the mainstay of their treatment. On the other hand, neoadjuvant or pre-surgical treatments provide a number of advantages for tumor management. In this review we will discuss the existing evidence on neoadjuvant endocrine therapy, as well as its possible future indications. Abstract Endocrine therapy (ET) has established itself as an efficacious treatment for estrogen receptor-positive (ER+) breast cancers, with a reduction in recurrence rates and increased survival rates. The pre-surgical approach with chemotherapy (NCT) has become a common form of management for large, locally advanced, or high-risk tumors. However, a good response to NCT is not usually expected in ER+ tumors. Good results with primary ET, mainly in elderly women, have encouraged studies in other stages of life, and nowadays neoadjuvant endocrine treatment (NET) has become a useful approach to many ER+ breast cancers. The aim of this review is to provide an update on the current state of art regarding the present and the future role of NET.
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13
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Cocco D, Valente SA. Sentinel Lymph Node Mapping and Biopsy in Breast Cancer Patients During the COVID-19 Pandemic. Ann Surg Oncol 2021; 28:4056-4057. [PMID: 33432488 PMCID: PMC7799421 DOI: 10.1245/s10434-020-09554-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2020] [Accepted: 12/10/2020] [Indexed: 12/29/2022]
Affiliation(s)
- Daniela Cocco
- Breast Services, Cleveland Clinic Foundation, Cleveland, OH, USA.
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14
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Zhang A, Wang X, Fan C, Mao X. The Role of Ki67 in Evaluating Neoadjuvant Endocrine Therapy of Hormone Receptor-Positive Breast Cancer. Front Endocrinol (Lausanne) 2021; 12:687244. [PMID: 34803903 PMCID: PMC8597938 DOI: 10.3389/fendo.2021.687244] [Citation(s) in RCA: 39] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/29/2021] [Accepted: 10/12/2021] [Indexed: 11/13/2022] Open
Abstract
Ki67 is a proliferation marker. It has been proposed as a useful clinical marker for breast cancer subtype classification, prognosis, and prediction of therapeutic response. But the questionable analytical validity of Ki67 prevents its widespread adoption of these measures for treatment decisions in breast cancer. Currently, Ki67 has been tested as a predictive marker for chemotherapy using clinical and pathological response as endpoints in neoadjuvant endocrine therapy. Ki67 can be used as a predictor to evaluate the recurrence-free survival rate of patients, or its change can be used to predict the preoperative "window of opportunity" in neoadjuvant endocrine therapy. In this review, we will elaborate on the role of Ki67 in neoadjuvant endocrine therapy in breast cancer.
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Affiliation(s)
- Ailin Zhang
- Department of Breast Surgery, The First Affiliated Hospital of China Medical University, Shenyang, China
| | - Xiaojing Wang
- Department of Pathology, First Affiliated Hospital and College of Basic Medical Sciences of China Medical University, Shenyang, China
| | - Chuifeng Fan
- Department of Pathology, First Affiliated Hospital and College of Basic Medical Sciences of China Medical University, Shenyang, China
| | - Xiaoyun Mao
- Department of Breast Surgery, The First Affiliated Hospital of China Medical University, Shenyang, China
- *Correspondence: Xiaoyun Mao,
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Cavalcante FP, Novita GG, Millen EC, Zerwes FP, de Oliveira VM, Sousa ALL, Freitas Junior R. Management of early breast cancer during the COVID-19 pandemic in Brazil. Breast Cancer Res Treat 2020; 184:637-647. [PMID: 32803637 PMCID: PMC7429139 DOI: 10.1007/s10549-020-05877-y] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2020] [Accepted: 08/10/2020] [Indexed: 01/09/2023]
Abstract
PURPOSE The COVID-19 pandemic has impacted early breast cancer (EBC) treatment worldwide. This study analyzed how Brazilian breast specialists are managing EBC. METHODS An electronic survey was conducted with members of the Brazilian Society of Breast Cancer Specialists (SBM) between April 30 and May 11, 2020. Bivariate analysis was used to describe changes in how specialists managed EBC at the beginning and during the pandemic, according to breast cancer subtype and oncoplastic surgery. RESULTS The response rate was 34.4% (503/1462 specialists). Most of the respondents (324; 64.4%) lived in a state capital city, were board-certified as breast specialists (395; 78.5%) and either worked in an academic institute or one associated with breast cancer treatment (390; 77.5%). The best response rate was from the southeast of the country (240; 47.7%) followed by the northeast (128; 25.4%). At the beginning of the pandemic, 43% changed their management approach. As the outbreak progressed, this proportion increased to 69.8% (p < 0.001). The southeast of the country (p = 0.005) and the state capital cities (p < 0.001) were associated with changes at the beginning of the pandemic, while being female (p = 0.001) was associated with changes during the pandemic. For hormone receptor-positive tumors with the best prognosis (Ki-67 < 20%), 47.9% and 17.7% of specialists would recommend neoadjuvant endocrine therapy for postmenopausal and premenopausal women, respectively. For tumors with poorer prognosis (Ki-67 > 30%), 34% and 10.9% would recommend it for postmenopausal and premenopausal women, respectively. Menopausal status significantly affected whether the specialists changed their approach (p < 0.00001). For tumors ≥ 1.0 cm, 42.9% of respondents would recommend neoadjuvant systemic therapy for triple-negative tumors and 39.6% for HER2 + tumors. Overall, 63.4% would recommend immediate total breast reconstruction, while only 3.4% would recommend autologous reconstruction. In breast-conserving surgery, 75% would recommend partial breast reconstruction; however, 54.1% would contraindicate mammoplasty. Furthermore, 84.9% of respondents would not recommend prophylactic mastectomy in cases of BRCA mutation. CONCLUSIONS Important changes occurred in EBC treatment, particularly for hormone receptor-positive tumors, as the outbreak progressed in each region. Systematic monitoring could assure appropriate breast cancer treatment, mitigating the impact of the pandemic.
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Affiliation(s)
| | | | | | - Felipe Pereira Zerwes
- Pontificia Universidade Católica do Rio Grande do Sul, Porto Alegre, Rio Grande do Sul Brazil
| | | | | | - Ruffo Freitas Junior
- Advanced Center for Diagnosis and Treatment for Breast Cancer (CORA), Federal University of Goiás, Goiânia, Goiás Brazil
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16
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Ngaserin S, Chua HW, Chew M, Tan BK. A tripartite approach can seek to optimize breast cancer management during a pandemic - Real-Time experience of a developing breast oncology unit in Singapore. Breast J 2020; 26:1593-1596. [PMID: 32608540 PMCID: PMC7361843 DOI: 10.1111/tbj.13961] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2020] [Revised: 06/12/2020] [Accepted: 06/12/2020] [Indexed: 11/28/2022]
Affiliation(s)
- Sabrina Ngaserin
- Department of SurgerySengkang General HospitalSingapore
- SingHealth Duke‐NUS Breast CentreSingapore
| | - Hui Wen Chua
- Department of SurgerySengkang General HospitalSingapore
- SingHealth Duke‐NUS Breast CentreSingapore
| | - Min‐Hoe Chew
- Department of SurgerySengkang General HospitalSingapore
| | - Benita Kiat‐Tee Tan
- Department of SurgerySengkang General HospitalSingapore
- SingHealth Duke‐NUS Breast CentreSingapore
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Dowsett M, Ellis MJ, Dixon JM, Gluz O, Robertson J, Kates R, Suman VJ, Turnbull AK, Nitz U, Christgen M, Kreipe H, Kuemmel S, Bliss JM, Barry P, Johnston SR, Jacobs SA, Ma CX, Smith IE, Harbeck N. Evidence-based guidelines for managing patients with primary ER+ HER2- breast cancer deferred from surgery due to the COVID-19 pandemic. NPJ Breast Cancer 2020; 6:21. [PMID: 32550266 PMCID: PMC7280290 DOI: 10.1038/s41523-020-0168-9] [Citation(s) in RCA: 37] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2020] [Accepted: 05/21/2020] [Indexed: 12/24/2022] Open
Abstract
Many patients with ER+ HER2- primary breast cancer are being deferred from surgery to neoadjuvant endocrine therapy (NeoET) during the COVID-19 pandemic. We have collated data from multiple international trials of presurgical endocrine therapy in order to provide guidance on the identification of patients who may have insufficiently endocrine-sensitive tumors and should be prioritised for early surgery or neoadjuvant chemotherapy rather than NeoET during or in the aftermath of the COVID-19 pandemic for safety or when surgical activity needs to be prioritized. For postmenopausal patients, our data provide strong support for the use of ER and PgR status at diagnosis for triaging of patients into three groups in which (taking into account clinical factors): (i) NeoET is likely to be inappropriate (Allred ER <6 or ER 6 and PgR <6) (ii) a biopsy for Ki67 analysis (on-treatment Ki67) could be considered after 2-4 weeks of NeoET (a: ER 7 or 8 and PgR <6 or b: ER 6 or 7 and PgR ≥6) or (iii) NeoET is an acceptable course of action (ER 8 and PgR ≥6). Cut-offs for percentage of cells positive are also given. For group (ii), a high early on-treatment level of Ki67 (>10%) indicates a higher priority for early surgery. Too few data were available for premenopausal patients to provide a similar treatment algorithm. These guidelines should be helpful for managing patients with early ER+ HER2- breast cancer during and in the aftermath of the COVID-19 crisis.
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Affiliation(s)
- Mitch Dowsett
- Ralph Lauren Centre for Breast Cancer Research, Royal Marsden Hospital, London, UK
- Breast Cancer Now Toby Robins Research Centre, Institute of Cancer Research, London, UK
| | - Matthew J. Ellis
- Lester and Sue Smith Breast Center and Dan L. Duncan Comprehensive Cancer Center, Baylor College of Medicine, Houston, TX USA
- Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, TX USA
- Department of Medicine, Baylor College of Medicine, Houston, TX USA
| | | | - Oleg Gluz
- Bethesda Hospital, Breast Center Niederrhein, Mönchengladbach, Germany
- Westdeutsche Studiengruppe, Mönchengladbach, Germany
- Uniklinik Köln, Köln, Germany
| | - John Robertson
- University of Nottingham, Royal Derby Hospital, Uttoxeter Road, Derby, UK
| | - Ronald Kates
- West German Study Group, Mönchengladbach, Germany
| | - Vera J. Suman
- Division of Biomedical Statistics and Informatics, Department of Health Sciences Research, Mayo Clinic, Rochester, MN USA
| | - Arran K. Turnbull
- CRUK Edinburgh Centre, Institute of Genetics and Molecular Medicine, University of Edinburgh, Edinburgh, UK
| | - Ulrike Nitz
- Bethesda Hospital, Breast Center Niederrhein, Mönchengladbach, Germany
| | | | - Hans Kreipe
- Medical School Hannover, Institute of Pathology, Hannover, Germany
| | | | - Judith M. Bliss
- Clinical Trials and Statistics Unit, The Institute of Cancer Research, London, UK
| | - Peter Barry
- Breast Unit, Royal Marsden Hospital, London, UK
| | | | - Samuel A. Jacobs
- National Surgical Adjuvant Breast and Bowel Project Foundation, Pittsburgh, PA USA
| | - Cynthia X. Ma
- Division of Oncology, Department of Medicine, Washington University School of Medicine, St. Louis, MO 63110 USA
| | | | - Nadia Harbeck
- West German Study Group, Mönchengladbach, Germany
- Breast Center, Department of Obstetrics and Gynecology, and CCCLMU, LMU University Hospital, Munich, Germany
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