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Liu Y, Gordon AS, Eleff M, Barron JJ, Chi WC. The Association Between Mammography Screening Frequency and Breast Cancer Treatment and Outcomes: A Retrospective Cohort Study. JOURNAL OF BREAST IMAGING 2023; 5:21-29. [PMID: 38416960 DOI: 10.1093/jbi/wbac071] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2022] [Indexed: 03/01/2024]
Abstract
OBJECTIVE Guidelines for optimal frequency of screening mammography vary by professional society. Sparse evidence exists on the association between screening frequency and breast cancer treatment options. The main objective was to examine differences in cancer treatment rendered for U.S. women with different numbers of screenings prior to breast cancer diagnosis. Cancer stage at diagnosis and health care cost were assessed in secondary analyses. METHODS This IRB-exempt retrospective study used administrative claims data to identify women aged 44 or older with various numbers of mammographic screenings ≥11 months apart, during the four years prior to incident breast cancer diagnosis from January 2010 to December 2018. Outcomes were assessed over the six months following diagnosis. Generalized linear regression models were used to compare women with differing numbers of mammograms, adjusting for patient characteristics. RESULTS Claims data review identified 25 492 women who met inclusion criteria. There was a stepwise improvement in each of these screening categories such that women with four screenings, compared to women with only one screening, experienced higher rates of lumpectomy (70% vs 55%) and radiation therapy (48% vs 36%), lower rates of mastectomy (27% vs 34%) and chemotherapy (28% vs 36%), less stage 3 or 4 cancer at diagnosis (15% vs 29%), and lower health care costs within six months postdiagnosis (P < 0.001). Results were similar in a subgroup limited to women aged 44 to 49 at diagnosis. CONCLUSION Potential benefits of more frequent screening include less aggressive treatment and lower health care costs among women who develop breast cancer.
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Affiliation(s)
- Ying Liu
- Elevance Health, Public Policy Institute, Indianapolis, IN, USA
| | - Aliza S Gordon
- Elevance Health, Public Policy Institute, Indianapolis, IN, USA
| | - Michael Eleff
- Elevance Health, Integrated Health Program, Indianapolis, IN, USA
| | - John J Barron
- HealthCore, Inc, Business Development, Wilmington, DE, USA
| | - Winnie C Chi
- Elevance Health, Domain Strategy and Planning, Indianapolis, IN, USA
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Epidemiology of De Novo Metastatic Breast Cancer. Clin Breast Cancer 2021; 21:302-308. [PMID: 33750642 DOI: 10.1016/j.clbc.2021.01.017] [Citation(s) in RCA: 29] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2020] [Revised: 12/27/2020] [Accepted: 01/24/2021] [Indexed: 11/22/2022]
Abstract
Most cases of metastatic breast cancer (MBC) arise as a recurrence of a previously treated early breast cancer. Distinct from recurrent MBC is de novo MBC (dnMBC), which describes patients who present with distant sites of disease at initial diagnosis and is reviewed here. dnMBC represents approximately 3% to 6% of new breast cancer diagnoses in high-income countries. This incidence has not declined despite decades of widespread use of population-based mammography screening. Overrepresentation of both biologically aggressive tumors and patients negatively impacted by social determinants of health are characteristics of dnMBC. Survival has generally been superior for patients with dnMBC compared with those with recurrent MBC, although it is similar to that for patients with recurrent MBC with long disease-free intervals. Subgroups of patients with dnMBC who experience prolonged survival include those with human epidermal growth factor receptor-2-positive disease or hormone receptor-positive bone-only disease. Opportunities to decrease dnMBC presentation may include novel screening modalities suited for biologically aggressive breast tumors and improved access to health care. Recognizing that there will remain some women diagnosed with dnMBC, refining our ability to identify those likely to be long-term survivors could allow for appropriate escalation or de-escalation of care. Finally, evaluation of tumor genomics in robust sample sizes has the potential to advance our knowledge of the biology of dnMBC as an entity distinct from recurrent MBC.
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Canelo-Aybar C, Ferreira DS, Ballesteros M, Posso M, Montero N, Solà I, Saz-Parkinson Z, Lerda D, Rossi PG, Duffy SW, Follmann M, Gräwingholt A, Alonso-Coello P. Benefits and harms of breast cancer mammography screening for women at average risk of breast cancer: A systematic review for the European Commission Initiative on Breast Cancer. J Med Screen 2021; 28:389-404. [PMID: 33632023 DOI: 10.1177/0969141321993866] [Citation(s) in RCA: 26] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
OBJECTIVES Mammography screening is generally accepted in women aged 50-69, but the balance between benefits and harms remains controversial in other age groups. This study systematically reviews these effects to inform the European Breast Cancer Guidelines. METHODS We searched PubMed, EMBASE and Cochrane Library for randomised clinical trials (RCTs) or systematic reviews of observational studies in the absence of RCTs comparing invitation to mammography screening to no invitation in women at average breast cancer (BC) risk. We extracted data for mortality, BC stage, mastectomy rate, chemotherapy provision, overdiagnosis and false-positive-related adverse effects. We performed a pooled analysis of relative risks, applying an inverse-variance random-effects model for three age groups (<50, 50-69 and 70-74). GRADE (Grading of Recommendations Assessment, Development and Evaluation) was used to assess the certainty of evidence. RESULTS We identified 10 RCTs including 616,641 women aged 38-75. Mammography reduced BC mortality in women aged 50-69 (relative risk (RR) 0.77, 95%CI (confidence interval) 0.66-0.90, high certainty) and 70-74 (RR 0.77, 95%CI 0.54-1.09, high certainty), with smaller reductions in under 50s (RR 0.88, 95%CI 0.76-1.02, moderate certainty). Mammography reduced stage IIA+ in women 50-69 (RR 0.80, 95%CI 0.64-1.00, very low certainty) but resulted in an overdiagnosis probability of 23% (95%CI 18-27%) and 17% (95%CI 15-20%) in under 50s and 50-69, respectively (moderate certainty). Mammography was associated with 2.9% increased risk of invasive procedures with benign outcomes (low certainty). CONCLUSIONS For women 50-69, high certainty evidence that mammography screening reduces BC mortality risk would support policymakers formulating strong recommendations. In other age groups, where the net balance of effects is less clear, conditional recommendations will be more likely, together with shared decision-making.
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Affiliation(s)
- Carlos Canelo-Aybar
- CIBER de Epidemiología y Salud Pública (CIBERESP), Madrid, Spain.,Department of Clinical Epidemiology and Public Health, Iberoamerican Cochrane Centre, Biomedical Research Institute Sant Pau (IIB Sant Pau), Barcelona, Spain
| | - Diogenes S Ferreira
- Department of Clinical Epidemiology and Public Health, Iberoamerican Cochrane Centre, Biomedical Research Institute Sant Pau (IIB Sant Pau), Barcelona, Spain.,Department of Epidemiology and Preventive Medicine, School of Public Health and Preventive Medicine, Monash University, Melbourne, Australia
| | - Mónica Ballesteros
- Department of Clinical Epidemiology and Public Health, Iberoamerican Cochrane Centre, Biomedical Research Institute Sant Pau (IIB Sant Pau), Barcelona, Spain
| | - Margarita Posso
- Department of Clinical Epidemiology and Public Health, Iberoamerican Cochrane Centre, Biomedical Research Institute Sant Pau (IIB Sant Pau), Barcelona, Spain.,Department of Epidemiology and Evaluation, IMIM (Hospital del Mar Medical Research Institute), Barcelona, Spain
| | - Nadia Montero
- Department of Clinical Epidemiology and Public Health, Iberoamerican Cochrane Centre, Biomedical Research Institute Sant Pau (IIB Sant Pau), Barcelona, Spain
| | - Ivan Solà
- Department of Clinical Epidemiology and Public Health, Iberoamerican Cochrane Centre, Biomedical Research Institute Sant Pau (IIB Sant Pau), Barcelona, Spain
| | | | - Donata Lerda
- European Commission, Joint Research Centre (JRC), Ispra, VA, Italy
| | - Paolo G Rossi
- Epidemiology Unit, AUSL - IRCCS di Reggio Emilia, RE, Italy
| | - Stephen W Duffy
- Centre for Cancer Prevention, Wolfson Institute of Preventive Medicine, Queen Mary University of London, London, UK
| | | | | | - Pablo Alonso-Coello
- CIBER de Epidemiología y Salud Pública (CIBERESP), Madrid, Spain.,Department of Clinical Epidemiology and Public Health, Iberoamerican Cochrane Centre, Biomedical Research Institute Sant Pau (IIB Sant Pau), Barcelona, Spain
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Xuan Q, Gao K, Song Y, Zhao S, Dong L, Zhang Z, Zhang Q, Wang J. Adherence to Needed Adjuvant Therapy Could Decrease Recurrence Rates for Rural Patients With Early Breast Cancer. Clin Breast Cancer 2016; 16:e165-e173. [DOI: 10.1016/j.clbc.2016.07.006] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2016] [Revised: 07/18/2016] [Accepted: 07/20/2016] [Indexed: 10/21/2022]
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Baré M, Bonfill X, Andreu X. Relationship between the method of detection and prognostic factors for breast cancer in a community with a screening programme. J Med Screen 2016; 13:183-91. [PMID: 17217607 DOI: 10.1177/096914130601300405] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Objectives To analyse and compare the prognostic factors of breast cancer in the target population of our community-screening programme as a function of the method of detection and to analyse the differences in the prognostic factors as a function of the patient's age and the screening episode. Setting A Breast Cancer-Screening Programme (BCSP) in Northeast Spain. Methods Observational study of all primary malignant breast lesions diagnosed in a woman between 50 and 69 years of age between 18 October 1995 and 31 December 2002. The 16 centres that women from the target population might have attended were contacted. Results A total of 225 (37.2%) of the lesions included were diagnosed through the BCSP, 59 (9.7%) interval cancers were detected, and 321 (53.1%) were detected through other circuits. Node involvement was significantly lower in the lesions detected at screening (32%) in comparison to the interval cancers (41.8%) and those detected through other circuits (47.5%). A significantly larger percentage of the interval tumours (28.6%) and the lesions diagnosed outside the BCSP (22.1%) scored 5.4 on the Nottingham Prognostic Index (NPI) than those diagnosed within the programme (10.9%). The relation between the NPI and the detection method was only statistically significant in the 65-69-year-old age group. The NPI score of the tumours detected by the BCSP showed a statistically significant association with age. Conclusion This analysis has shown notable differences in some prognostic factors for breast cancer according to the method of detection. Association between age and the a priori prognosis of the malignant lesions arises.
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Affiliation(s)
- Marisa Baré
- Breast Cancer Screening Office and Epidemiology and Assessment Unit, UDIAT, Centre Diagnòstic, Corporació Sanitària del Parc Taulí-Institut Universitari Parc Taulí-UAB, Sabadell, Spain.
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Woods LM, Rachet B, O'Connell DL, Lawrence G, Coleman MP. Are international differences in breast cancer survival between Australia and the UK present amongst both screen-detected women and non-screen-detected women? survival estimates for women diagnosed in West Midlands and New South Wales 1997-2006. Int J Cancer 2016; 138:2404-14. [PMID: 26756306 PMCID: PMC4788140 DOI: 10.1002/ijc.29984] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2015] [Accepted: 11/30/2015] [Indexed: 11/30/2022]
Abstract
We examined survival in screened-detected and non-screen-detected women diagnosed in the West Midlands (UK) and New South Wales (Australia) in order to evaluate whether international differences in survival are related to early diagnosis, or to other factors relating to the healthcare women receive. Data for women aged 50 - 65 years who had been eligible for screening from 50 years were examined. Data for 5,628 women in West Midlands and 6,396 women in New South Wales were linked to screening service records (mean age at diagnosis 53.7 years). We estimated net survival and modelled the excess hazard ratio of breast cancer death by screening status. Survival was lower for women in the West Midlands than in New South Wales (5-year net survival 90.9% [95% CI 89.9%-91.7%] compared with 93.4% [95% CI 92.6%-94.1%], respectively). The difference was greater between the two populations of non-screen-detected women (4.9%) compared to between screen-detected women, (1.8% after adjustment for lead-time and over-diagnosis). The adjusted excess hazard ratio of breast cancer death for West Midlands compared with New South Wales was greater in the non-screen-detected group (EHR 2.00, 95% CI 1.70 - 2.31) but not significantly different to that for women whose cancer had been screen-detected (EHR 1.72, 95% CI 0.87 - 2.56). In this study more than one in three breast cancer deaths in the West Midlands would have been avoided if survival had been the same as in New South Wales. The possibility that women in the UK receive poorer treatment is an important potential explanation which should be examined with care.
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Affiliation(s)
- Laura M. Woods
- Cancer Research UK Cancer Survival GroupDepartment of Non‐Communicable Disease Epidemiology, London School of Hygiene and Tropical MedicineLondonWC1E 7HT
| | - Bernard Rachet
- Cancer Research UK Cancer Survival GroupDepartment of Non‐Communicable Disease Epidemiology, London School of Hygiene and Tropical MedicineLondonWC1E 7HT
| | | | - Gill Lawrence
- Breast Cancer Audit Consultant and Former DirectorWest Midlands Cancer Intelligence Unit, Public Health Building, University of BirminghamBirminghamB15 2TT
| | - Michel P. Coleman
- Cancer Research UK Cancer Survival GroupDepartment of Non‐Communicable Disease Epidemiology, London School of Hygiene and Tropical MedicineLondonWC1E 7HT
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Leung J, McKenzie S, Martin J, Dobson A, McLaughlin D. Longitudinal Patterns of Breast Cancer Screening: Mammography, Clinical, and Breast Self-Examinations in a Rural and Urban Setting. Womens Health Issues 2014; 24:e139-46. [DOI: 10.1016/j.whi.2013.11.005] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2013] [Revised: 11/12/2013] [Accepted: 11/12/2013] [Indexed: 11/27/2022]
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Nguyen-Pham S, Leung J, McLaughlin D. Disparities in breast cancer stage at diagnosis in urban and rural adult women: a systematic review and meta-analysis. Ann Epidemiol 2013; 24:228-35. [PMID: 24462273 DOI: 10.1016/j.annepidem.2013.12.002] [Citation(s) in RCA: 104] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2013] [Revised: 11/11/2013] [Accepted: 12/23/2013] [Indexed: 10/25/2022]
Abstract
PURPOSE Survival from breast cancer is dependent on stage at diagnosis and some evidence suggests that rural women are more likely than urban women to be diagnosed with advanced stage disease. This systematic review and meta-analysis compared the stage of breast cancer at diagnosis between women residing in urban and rural areas. METHODS PubMed (1951-2012), EMBASE (1966-2012), CINAHL (1982-2012), RURAL (1966-2012), and Sociological abstracts (1952-2012) were systematically searched in November 2012 for relevant peer reviewed studies. Studies on adult women were included if they reported quantitative comparisons of rural and urban differences in staging of breast cancer at diagnosis. RESULTS Twenty-four studies were included in the systematic review and 21 studies had sufficient information for inclusion in the meta-analysis (N = 879,660). Evidence indicated that patients residing in rural areas were more likely to be diagnosed with more advanced breast cancer. Using a random effects model, the results of the meta-analysis showed that rural breast cancer patients had 1.19 higher odds (95% confidence interval, 1.12-1.27) of late stage breast cancer compared with urban breast cancer patients. CONCLUSIONS Rural women were more likely than urban women to be diagnosed at a later stage. Preventive measures may need to target the rural population.
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Affiliation(s)
| | - Janni Leung
- School of Population Health, The University of Queensland, Brisbane, Australia
| | - Deirdre McLaughlin
- School of Population Health, The University of Queensland, Brisbane, Australia.
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Davidson A, Chia S, Olson R, Nichol A, Speers C, Coldman AJ, Bajdik C, Woods R, Tyldesley S. Stage, treatment and outcomes for patients with breast cancer in British Columbia in 2002: a population-based cohort study. CMAJ Open 2013; 1:E134-41. [PMID: 25077115 PMCID: PMC3985980 DOI: 10.9778/cmajo.20130017] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Abstract
BACKGROUND There are very few long-term Canadian data on breast cancer outcomes by stage. We described the stage, treatment and outcomes of breast cancer at a population level for patients in British Columbia. METHODS This population-based cohort study included almost all patients with incident breast cancer registered in 2002 (about 97.6% registry case completeness). For these patients, information on stage, primary local surgery, radiotherapy, chemotherapy, hormone therapy and survival outcome (based on registry date and cause-of-death data) were available. We calculated Kaplan-Meier curves for breast cancer-specific survival and overall survival by stage and analyzed prognostic and treatment factors with a multivariable Cox model. RESULTS The 2927 incident cases of breast cancer identified in 2002 had the following distribution by stage: stage 0 (in situ), 424 (14%); stage I, 1118 (38%); stage II, 938 (32%); stage III, 233 (8%); stage IV, 123 (4%); unknown, 91 (3%). The distribution of patients' ages was < 40 years, 127 (4%); 40-49, 538 (18%); 50-59, 719 (25%); 60-69, 660 (23%); 70-79, 583 (20%); ≥ 80, 300 (10%). Within the first year after diagnosis, radiotherapy was provided to 1649 patients (56%), chemotherapy to 928 (32%) and hormone therapy to 1664 (57%). Ten-year breast cancer-specific survival rates by stage were > 99% for stage 0, 95% for stage I, 81% for stage II, 55% for stage III and 4% for stage IV. Ten-year overall survival rates were 89% for stage 0, 81% for stage I, 68% for stage II, 43% for stage III and 2% for stage IV. INTERPRETATION This analysis provides a Canadian benchmark for treatment rates and 10-year outcomes by stage for all incident cases of breast cancer in a single province. Outcomes in British Columbia compared well with published rates for the United States and Europe.
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Affiliation(s)
- Ashley Davidson
- Department of Medical Oncology, Fraser Valley Centre, British Columbia Cancer Agency, Vancouver, BC
| | - Stephen Chia
- Breast Cancer Outcomes Unit, British Columbia Cancer Agency, Vancouver, BC
- Department of Medical Oncology, Vancouver Centre, British Columbia Cancer Agency, Vancouver, BC
| | - Robert Olson
- Department of Radiation Oncology, Centre for the North, British Columbia Cancer Agency, Vancouver, BC
| | - Alan Nichol
- Department of Radiation Oncology, Vancouver Centre, British Columbia Cancer Agency, Vancouver, BC
| | - Caroline Speers
- Breast Cancer Outcomes Unit, British Columbia Cancer Agency, Vancouver, BC
| | - Andy J. Coldman
- Cancer Surveillance and Outcomes, British Columbia Cancer Agency, Vancouver, BC
| | - Chris Bajdik
- British Columbia Research Centre, British Columbia Cancer Agency, Vancouver, BC
| | - Ryan Woods
- Breast Cancer Outcomes Unit, British Columbia Cancer Agency, Vancouver, BC
| | - Scott Tyldesley
- Breast Cancer Outcomes Unit, British Columbia Cancer Agency, Vancouver, BC
- Department of Radiation Oncology, Vancouver Centre, British Columbia Cancer Agency, Vancouver, BC
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Reduction in rate of node metastases with breast screening: consistency of association with tumor size. Breast Cancer Res Treat 2012; 137:653-63. [DOI: 10.1007/s10549-012-2384-y] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2012] [Accepted: 12/10/2012] [Indexed: 10/27/2022]
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Redondo M, Funez R, Medina-Cano F, Rodrigo I, Acebal M, Tellez T, Roldan MJ, Hortas ML, Bellinvia A, Pereda T, Domingo L, Morales-Suarez Varela M, Sala M, Rueda A. Detection methods predict differences in biology and survival in breast cancer patients. BMC Cancer 2012; 12:604. [PMID: 23244222 PMCID: PMC3541058 DOI: 10.1186/1471-2407-12-604] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2012] [Accepted: 12/13/2012] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND The aim of this study was to measure the biological characteristics involved in tumorigenesis and the progression of breast cancer in symptomatic and screen-detected carcinomas to identify possible differences. METHODS For this purpose, we evaluated clinical-pathological parameters and proliferative and apoptotic activities in a series of 130 symptomatic and 161 screen-detected tumors. RESULTS After adjustment for the smaller size of the screen-detected carcinomas compared with symptomatic cancers, those detected in the screening program presented longer disease-free survival (RR = 0.43, CI = 0.19-0.96) and had high estrogen and progesterone receptor concentrations more often than did symptomatic cancers (OR = 3.38, CI = 1.72-6.63 and OR = 3.44, CI = 1.94-6.10, respectively). Furthermore, the expression of bcl-2, a marker of good prognosis in breast cancer, was higher and HER2/neu expression was lower in screen-detected cancers than in symptomatic cancers (OR = 1.77, CI = 1.01-3.23 and OR = 0.64, CI = 0.40-0.98, respectively). However, when comparing prevalent vs incident screen-detected carcinomas, prevalent tumors were larger (OR = 2.84, CI = 1.05-7.69), were less likely to be HER2/neu positive (OR = 0.22, CI = 0.08-0.61) and presented lower Ki67 expression (OR = 0.36, CI = 0.17-0.77). In addition, incident tumors presented a shorter survival time than did prevalent ones (RR = 4.88, CI = 1.12-21.19). CONCLUSIONS Incident carcinomas include a variety of screen-detected carcinomas that exhibit differences in biology and prognosis relative to prevalent carcinomas. The detection method is important and should be taken into account when making therapy decisions.
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Affiliation(s)
- Maximino Redondo
- Research Unit, Hospital Costa del Sol, University of Málaga, Red de Investigación en Servicios de Salud en Enfermedades Crónicas (REDISSEC), Carretera de Cádiz Km 187, 29600 MarbellaMálaga, Spain.
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Haikel RL, Mauad EC, Silva TB, Mattos JSDC, Chala LF, Longatto-Filho A, de Barros N. Mammography-based screening program: preliminary results from a first 2-year round in a Brazilian region using mobile and fixed units. BMC WOMENS HEALTH 2012; 12:32. [PMID: 23031787 PMCID: PMC3532077 DOI: 10.1186/1472-6874-12-32] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 03/29/2012] [Accepted: 09/26/2012] [Indexed: 11/10/2022]
Abstract
BACKGROUND Breast cancer is the most frequently diagnosed cancer and the leading cause of cancer deaths among women worldwide. The use of mobile mammography units to offer screening to women living in remote areas is a rational strategy to increase the number of women examined. This study aimed to evaluate results from the first 2 years of a government-organized mammography screening program implemented with a mobile unit (MU) and a fixed unit (FU) in a rural county in Brazil. The program offered breast cancer screening to women living in Barretos and the surrounding area. METHODS Based on epidemiologic data, 54 238 women, aged 40 to 69 years, were eligible for breast cancer screening. The study included women examined from April 1, 2003 to March 31, 2005. The chi-square test and Bonferroni correction analyses were used to evaluate the frequencies of tumors and the importance of clinical parameters and tumor characteristics. Significance was set at p < 0.05. RESULTS Overall, 17 964 women underwent mammography. This represented 33.1% of eligible women in the area. A mean of 18.6 and 26.3 women per day were examined in the FU and MU, respectively. Seventy six patients were diagnosed with breast cancer (41 (54%) in the MU). This represented 4.2 cases of breast cancer per 1000 examinations. The number of cancers detected was significantly higher in women aged 60 to 69 years than in those aged 50 to 59 years (p < 0.001) or 40 to 49 years (p < 0.001). No difference was observed between women aged 40 to 49 years and those aged 50 to 59 years (p = 0.164). The proportion of tumors in the early (EC 0 and EC I) and advanced (CS III and CS IV) stages of development were 43.4% and 15.8%, respectively. CONCLUSIONS Preliminary results indicate that this mammography screening program is feasible for implementation in a rural Brazilian territory and favor program continuation.
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Affiliation(s)
- Raphael Luiz Haikel
- Department of Cancer Prevention, Barretos Cancer Hospital, Rua Antenor Duarte Villella, 1331 -, Barretos, São Paulo, SP 14784-400, Brazil.
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Olson RA, Nichol A, Caron NR, Olivotto IA, Speers C, Chia S, Davidson A, Coldman A, Bajdik C, Tyldesley S. Effect of community population size on breast cancer screening, stage distribution, treatment use and outcomes. Canadian Journal of Public Health 2012. [PMID: 22338328 DOI: 10.1007/bf03404068] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Abstract
OBJECTIVE Residents of rural communities have decreased access to cancer screening and treatments compared to urban residents, though use of resources and patient outcomes have not been assessed with a comprehensive population-based analysis. The objectives of this study were to investigate whether breast cancer screening and treatments were utilized less frequently in rural BC and whether this translated into differences in outcomes. METHODS All patients diagnosed with breast cancer in British Columbia (BC) during 2002 were identified from the Cancer Registry and linked to the Screening Mammography database. Patient demographics, pathology, stage, treatments, mammography use and death data were abstracted. Patients were categorized as residing in large, small and rural local health authorities (LHAs) using Canadian census information. Use of resources and outcomes were compared across these LHA size categories. We hypothesized that mastectomy rates (instead of breast-conserving surgery) would be higher in rural areas, since breast conservation is standardly accompanied by adjuvant radiotherapy, which has limited availability in rural BC. In contrast we hypothesized that cancer screening and systemic therapy use would be similar, as they are more widely dispersed across BC. Exploratory analyses were performed to assess whether disparities in screening and treatment utilization translated into differences in survival. RESULTS 2,869 breast cancer patients were included in our study. Patients from rural communities presented with more advanced disease (p=0.01). On multivariable analysis, patients from rural, compared to urban, LHAs were less likely to be screening mammography attendees (OR=0.62; p<0.001). Women from rural communities were less likely to undergo breast-conserving surgery (multivariable OR=0.47; p<0.001). There was no significant difference in use of chemotherapy (p=0.54) or hormonal therapy (p=0.36). The 5-year breast cancer-specific survival for large, small and rural LHAs was 90%, 88% and 86%, respectively (p=0.08), while overall survival was 84%, 81% and 77%, respectively (p=0.01). On multivariable analysis with 7.4 years of median follow-up, neither breast cancer-specific survival (HR=1.16; 0.76-1.76; p=0.49) nor overall survival (HR=1.25; 0.92-1.70; p=0.16) was significantly worse for patients from rural compared to large LHAs. CONCLUSION There was a significant difference in screening mammography use, stage distribution and loco-regional treatments use by population size of LHA. After controlling for differences in patient and tumour factors by LHA, survival was not significantly different.
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Affiliation(s)
- Robert A Olson
- BC Cancer Agency, Centre for the North, Prince George, BC.
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Malmgren JA, Parikh J, Atwood MK, Kaplan HG. Impact of mammography detection on the course of breast cancer in women aged 40-49 years. Radiology 2012; 262:797-806. [PMID: 22357883 PMCID: PMC6940006 DOI: 10.1148/radiol.11111734] [Citation(s) in RCA: 67] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
PURPOSE To analyze trends in detection method related to breast cancer stage at diagnosis, treatments, and outcomes over time among 40-49-year-old women. MATERIALS AND METHODS i This study was institutional review board approved, with a waiver of informed consent, and HIPAA compliant. A longitudinal prospective cohort study was conducted of women aged 40-49 years who had primary breast cancer, during 1990-2008, and were identified and tracked by a dedicated registry database (n = 1977). Method of detection--patient detected (PtD), physician detected (PhysD), or mammography detected (MamD)--was chart abstracted. Disease-specific survival and relapse-free survival statistics were calculated by using the Kaplan-Meier method for stage I-IV breast cancer. RESULTS A significant increase in the percentage of MamD breast cancer over time (28%-58%) and a concurrent decline in patient and physician detected (Pt/PhysD) breast cancer (73%-42%) (Pearson x(2) = 72.72, P < .001) were observed over time from 1990 to 2008, with an overall increase in lower-stage disease detection and a decrease in higher-stage disease. MamD breast cancer patients were more likely to undergo lumpectomy (67% vs 48% of Pt/PhysD breast cancer patients) and less likely to undergo modified radical mastectomy (25% vs 47% of the Pt/PhysD breast cancer patients) (P < .001). Uncorrected for stage, 13% of MamD breast cancer patients underwent surgery and chemotherapy versus 22% of Pt/PhysD breast cancer patients (P < .001), and 31% of MamD breast cancer patients underwent surgery, radiation therapy, and chemotherapy versus 59% of Pt/PhysD breast cancer patients (x(2) = 305.13, P < .001). Analyzing invasive cancers only, 5-year relapse-free survival for MamD breast cancer patients was 92% versus 88% for Pt/PhysD patients (log-rank test, 12.47; P < .001). CONCLUSION Increased mammography-detected breast cancer over time coincided with lower-stage disease detection resulting in reduced treatment and lower rates of recurrence, adding factors to consider when evaluating the benefits of mammography screening of women aged 40-49 years.
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Lehtimäki T, Lundin M, Linder N, Sihto H, Holli K, Turpeenniemi-Hujanen T, Kataja V, Isola J, Joensuu H, Lundin J. Long-term prognosis of breast cancer detected by mammography screening or other methods. Breast Cancer Res 2011; 13:R134. [PMID: 22204661 PMCID: PMC3326576 DOI: 10.1186/bcr3080] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2011] [Revised: 12/22/2011] [Accepted: 12/28/2011] [Indexed: 12/04/2022] Open
Abstract
Introduction Previous studies of breast cancer have shown that patients whose tumors are detected by mammography screening have a more favorable survival. Little is known, however, about the long-term prognostic impact of screen detection. The purpose of the current study was to compare breast cancer-specific long-term survival of patients whose tumors were detected in mammography screening compared with those whose tumors were detected by other methods. Methods Breast cancer patients diagnosed within five specified geographical areas in Finland in 1991 and 1992 were identified (N = 2,936). Detailed clinical, treatment and outcome data, as well as tissue samples, were collected. Women with in situ carcinoma, distant metastases at the time of primary diagnosis and women who were not treated surgically were excluded. The main analyses were performed after excluding patients with other malignancy or contralateral breast cancer, followed by sensitivity analyses with different exclusion criteria. Median follow-up time was 15.4 years. Univariate and multivariate analyses of breast cancer-specific survival were performed. Results Of patients included in the main analyses (n = 1,884), 22% (n = 408) of cancers were screen-detected and 78% (n = 1,476) were detected by other methods. Breast cancer-specific 15-year survival was 86% for patients with screen-detected cancer and 66% for patients diagnosed using other methods (P < 0.0001, HR = 2.91). Similar differences in survival were observed in women at screening age (50 to 69 years), as well as in clinically important subgroups, such as patients with small tumors (≤ 1 cm in diameter) and without nodal involvement (N0). Women with breast cancer diagnosed on the basis of screening mammography had a more favorable prognosis than those diagnosed outside screening programs, following adjustments according to patient age, tumor size, axillary lymph node status, histological grade and hormone receptor status. Significant differences in the risk of having future contralateral breast cancer according to method of detection were not observed. Conclusions Breast cancer detected by mammography screening is an independent prognostic factor in breast cancer and is associated with a more favorable survival rate as well as in long-term follow-up.
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Affiliation(s)
- Tiina Lehtimäki
- Institute for Molecular Medicine Finland (FIMM), University of Helsinki, Biomedicum Helsinki 2U, Tukholmankatu 8, PO Box 20, FI-00014 Helsinki, Finland.
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Yerushalmi R, Tyldesley S, Woods R, Kennecke HF, Speers C, Gelmon KA. Is breast-conserving therapy a safe option for patients with tumor multicentricity and multifocality? Ann Oncol 2011; 23:876-81. [PMID: 21810730 DOI: 10.1093/annonc/mdr326] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023] Open
Abstract
BACKGROUND We compared outcomes after breast-conserving therapy (BCT) and mastectomy in multicentric (MC)/multifocal (MF) versus unifocal breast cancer. PATIENTS AND METHODS Women with stage I-II disease were classified as having unifocal or MC/MF disease. MC/MF and other prognostic factors were compared using binary logistic regression analysis. Univariate and multivariate analyses (MVAs) for relapse were carried out using cumulative incidence curves and Fine and Gray regression models. For the BCT group, matched analysis was added. RESULTS Median follow-up was 7.9 years, 11 983 having BCT (unifocal: 11 683, MC/MF: 300) and 7771 having mastectomy (unifocal: 6884, MC/MF: 887). MC/MF patients treated with BCT were 50-69 years old, free of extensive ductal carcinoma in situ (DCIS), and had smaller tumors. The cumulative 10-year local recurrence rates among unifocal and MC/MF disease were 4.6% [95% confidence interval (CI) 4.1% to 5.0%] versus 5.5% (95% CI 2.6% to 9.9%) for the BCT group, P = 0.76 and 5.8% (95% CI 5.2% to 6.5%) versus 6.5% (95% CI 4.7% to 8.7%) for the mastectomy group, P = 0.77. MC/MF was not a significant factor for relapse or survival on MVA. In the matched analysis, relapse rates were similar in the unifocal and MC/MF groups, P = 0.60. CONCLUSION BCT is a reasonable option in selected MC/MF cases, particularly those women aged 50-69 years old with small (<1 cm) MF tumors and without an extensive DCIS component.
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Affiliation(s)
- R Yerushalmi
- Department of Medical Oncology, BC Cancer Agency, Vancouver, Canada.
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Sadjadi A, Hislop TG, Bajdik C, Bashash M, Ghorbani A, Nouraie M, Babaei M, Malekzadeh R, Yavari P. Comparison of breast cancer survival in two populations: Ardabil, Iran and British Columbia, Canada. BMC Cancer 2009; 9:381. [PMID: 19863791 PMCID: PMC2773238 DOI: 10.1186/1471-2407-9-381] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2008] [Accepted: 10/28/2009] [Indexed: 11/10/2022] Open
Abstract
Background Patterns in survival can provide information about the burden and severity of cancer, help uncover gaps in systemic policy and program delivery, and support the planning of enhanced cancer control systems. The aim of this paper is to describe the one-year survival rates for breast cancer in two populations using population-based cancer registries: Ardabil, Iran, and British Columbia (BC), Canada. Methods All newly diagnosed cases of female breast cancer were identified in the Ardabil cancer registry from 2003 to 2005 and the BC cancer registry for 2003. The International Classification of Disease for Oncology (ICDO) was used for coding cancer morphology and topography. Survival time was determined from cancer diagnosis to death. Age-specific one-year survival rates, relative survival rates and weighted standard errors were calculated using life-tables for each country. Results Breast cancer patients in BC had greater one-year survival rates than patients in Ardabil overall and for each age group under 60. Conclusion These findings support the need for breast cancer screening programs (including regular clinical breast examinations and mammography), public education and awareness regarding early detection of breast cancer, and education of health care providers.
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Affiliation(s)
- Alireza Sadjadi
- 1Digestive Disease Research Center, Shariati Hospital, Tehran University of Medical Sciences; Kargar Street, Tehran, Iran.
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Yerushalmi R, Kennecke H, Woods R, Olivotto IA, Speers C, Gelmon KA. Does multicentric/multifocal breast cancer differ from unifocal breast cancer? An analysis of survival and contralateral breast cancer incidence. Breast Cancer Res Treat 2008; 117:365-70. [PMID: 19082705 DOI: 10.1007/s10549-008-0265-1] [Citation(s) in RCA: 56] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2008] [Accepted: 11/25/2008] [Indexed: 01/13/2023]
Abstract
Purpose we evaluated whether patients with multifocal/multicentric (M/M) breast cancer have different outcomes compared to unifocal (U) disease in terms of survival and the development of contralateral breast cancer (CBC) disease. Methods women diagnosed with stage I-III breast cancer were classified as having U or M/M disease. Prognostic factors were prospectively collected and obtained from the breast cancer outcome unit database. Univariate and multivariable analyses for the incidence of CBC were performed as well as Kaplan-Meier plots. Results 25,320 women met inclusion criteria. The 5-year cumulative incidence of CBC in the U versus M/M group was 2.3% (95% CI 2.1, 2.5) versus 2.4% (95% CI 1.6, 3.4) (P = 0.349). Breast cancer specific survival (BCSS) rate revealed a slightly worse outcome with M/M disease, RR = 1.174 (95% CI 1,004, 1.372). Conclusions M/M breast cancer did not increase the risk of metachronous CBC, but was associated with inferior BCSS.
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Affiliation(s)
- Rinat Yerushalmi
- Division of Medical Oncology, British Columbia Cancer Agency, 600 w 10th Avenue, Vancouver, BC, Canada V5Z 4E6.
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Abstract
We introduce a new proliferation marker, securin (pituitary tumour-transforming 1 (PTTG1)), analysed in invasive ductal breast carcinomas by cDNA microarrays and immunohistochemistry. In cDNA microarray of a total of 4000 probes of genes, securin was revealed with a significant change in expression among the several proliferation-related genes studied. The value of securin as a proliferation marker was verified immunohistochemically (n=44) in invasive ductal breast cancer. In follow-up analyses of the sample of patients, the prognostic value of securin was compared with the established markers of breast cancer proliferation, Ki-67 and mitotic activity index (MAI). Our results of a small sample of patients suggest that low securin expression identifies a distinct subgroup of more favourable outcome among patients with high Ki-67 immunoexpression or high MAI. In univariate analysis of Cox's regression, 10-unit increment of securin immunopositivity was associated with a 2.3-fold overall risk of death due to breast cancer and a 7.1-fold risk of death due to breast cancer in the sample of patients stratified according to the cutoff points of 10 and 20% of securin immunopositivity. We suggest that securin immunostaining is a promising and clinically applicable proliferation marker. The finding urges further prognostic studies with a large sample of patients.
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Receipt of adjuvant systemic therapy among patients with high-risk breast cancer detected by mammography screening. Breast Cancer Res Treat 2008; 113:559-66. [DOI: 10.1007/s10549-008-9950-3] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2007] [Accepted: 02/20/2008] [Indexed: 10/22/2022]
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Clayforth C, Fritschi L, McEvoy S, Byrne MJ, Wylie E, Threlfall T, Sterrett G, Harvey JM, Jamrozik K. Assessing the effectiveness of a mammography screening service. ANZ J Surg 2005; 75:631-6. [PMID: 16076321 DOI: 10.1111/j.1445-2197.2005.03476.x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
BACKGROUND Trials have shown that mammography screening reduces mortality and probably decreases morbidity related to breast cancer. METHODS We assessed whether the major mammography service in Western Australia (BreastScreen WA) is likely to reduce mortality by comparing prognostic variables between screen-detected and other cases of breast cancer diagnosed in 1999. We assessed likely reductions in morbidity by comparing treatments received by these two groups. To confirm mortality and morbidity reduction, we also compared prognostic variables and treatments with targets. Information on demographic variables, tumour characteristics at presentation and treatments were collected from medical records for all incident cases of breast cancer in Western Australia in 1999. We matched cases with the Western Australian Cancer Registry records to determine which cases had been detected by BreastScreen WA. RESULTS BreastScreen WA achieved the targets for mortality reduction. Tumours detected by BreastScreen WA were smaller in size, less likely to have vascular invasion, of lower histological grade and were more likely to be ductal carcinoma in situ alone without invasive carcinoma. Oestrogen receptor status was more likely to be positive, the difference in progesterone status was not significant, and lymph node involvement tended to be lower. BreastScreen WA patients were treated more often with local therapy and less often with systemic therapy, and the proportion of patients treated with breast-conserving surgery was close to the target for minimizing morbidity in breast cancer. CONCLUSION Mammographic detection of breast cancer by BreastScreen WA is associated with reduced breast cancer morbidity and a more favourable prognosis.
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Affiliation(s)
- Cassandra Clayforth
- School of Population Health, University of Western Australia, Perth, Australia.
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Immonen-Räihä P, Kauhava L, Parvinen I, Holli K, Kronqvist P, Pylkkänen L, Helenius H, Kaljonen A, Räsänen O, Klemi PJ. Mammographic screening reduces risk of breast carcinoma recurrence. Cancer 2005; 103:474-82. [PMID: 15611974 DOI: 10.1002/cncr.20793] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
BACKGROUND The current report is a long-term evaluation of breast carcinoma recurrence, factors predicting recurrence, and postrecurrence prognosis in relation to patients' use of service screening, which has been provided in Turku, Finland, since 1987 for women ages 40-74 years. METHODS The current study included 527 invasive breast carcinomas: 418 in the screening group (which included screen-detected and interval malignancies) and 109 in the nonscreening group (which included breast carcinomas detected before initial screening and those detected in patients who chose not to undergo screening). These breast carcinomas were diagnosed among women ages 40-74 years between 1987 and 1993, with follow-up extending until the end of 2001. RESULTS In the screening group, the risk of recurrence was only approximately half of the corresponding risk in the nonscreening group (hazard ratio [HR], 0.57; 95% confidence interval [CI], 0.39-0.83; P = 0.003). Five years after the primary diagnosis, 16% of patients in the screening group and 28% of patients in the nonscreening group (P = 0.001) had experienced recurrence; 10 years after diagnosis, the corresponding rates were 21% and 34%, respectively (P = 0.001). Postrecurrence prognosis was comparable for both detection groups (HR, 1.17; 95% CI, 0.70-1.94; P = 0.551), with approximately half of all patients dying of disease 5 years after recurrence. Detection of breast carcinoma via a method other than mammographic screening was associated with a high risk of recurrence on univariate analysis. On Cox multivariate analysis, risk factors for recurrence included lobular histologic type (HR, 2.23; 95% CI, 1.44-3.48; P < 0.001), poor histologic grade (HR, 2.02; 95% CI, 1.20-3.39; P = 0.008), and large tumor size (HR, 1.60; 95% CI, 1.07-2.37; P = 0.021). CONCLUSIONS Long-term data from a population-based program demonstrated that mammographic screening reduced patients' risk of breast carcinoma recurrence. Specifically, the risk for patients with screen-detected disease was only approximately half of the risk for patients with non-screen-detected disease. Nonetheless, postrecurrence prognosis was comparable for patients in both detection groups.
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Affiliation(s)
- Pirjo Immonen-Räihä
- Department of Internal Medicine, University Hospital, University of Turku, Turku, Finland
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Barth RJ, Gibson GR, Carney PA, Mott LA, Becher RD, Poplack SP. Detection of Breast Cancer on Screening Mammography Allows Patients to Be Treated with Less-Toxic Therapy. AJR Am J Roentgenol 2005; 184:324-9. [PMID: 15615996 DOI: 10.2214/ajr.184.1.01840324] [Citation(s) in RCA: 64] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
OBJECTIVE Therapy for breast cancer is accompanied by acute and chronic toxicity. Little research has been conducted to determine the impact of the mode of breast cancer detection on the likelihood of receiving different types of treatment. The objective of this study was to determine whether detection of breast cancer on screening mammography is associated with less-toxic therapy. MATERIALS AND METHODS The study group for this retrospective cohort study consisted of 992 women with invasive breast cancer detected on screening mammography (n = 460) or at physical examination (n = 532) at a single institution between 1990 and 2001. To address the generalizability of study findings, we compared the characteristics of study participants with those diagnosed with breast cancer in a population-based mammography registry. RESULTS The patients whose breast cancer was detected on screening mammography more frequently had lymph nodes free of metastases (84% vs 58%, p < 0.0001), had smaller tumors (1.5 vs 2.9 cm, p < 0.0001), were more likely to be treated with breast conservation (56% vs 32%, p < 0.0001), and were less likely to be treated with chemotherapy (28% vs 56%, p < 0.0001). In a multivariate analysis with adjustments for age and functional status, patients whose cancer was detected at physical examination were more than twice as likely to undergo mastectomy (odds ratio [OR], 2.5; 95% confidence interval [CI], 1.9-3.3) and nearly three times as likely to be treated with chemotherapy (OR, 2.9; 95% CI, 2.1-3.9). For younger women (40-49 years old), the likelihood of receiving chemotherapy was more than doubled if the cancer was detected at physical examination rather than on screening mammograms (OR, 2.3; 95% CI, 1.3-4.0). For older women (>/= 70 years old), patients whose cancer was detected at physical examination were five times more likely to undergo mastectomy (OR, 5.8; 95% CI, 3.2-10.5) and four times more likely to receive chemotherapy (OR, 4.6; 95% CI, 1.6-13) than the group whose tumors were detected on screening mammography. CONCLUSION Breast cancers detected on screening mammography are smaller, are less likely to metastasize to lymph nodes, and are more likely to be treated with breast conservation and without chemotherapy. These findings provide an additional rationale for performing screening mammography, especially for women at age extremes for whom the survival benefit of screening mammography is debated.
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Affiliation(s)
- Richard J Barth
- Department of Surgery, Section of General Surgery, Dartmouth-Hitchcock Medical Center, Dartmouth Medical School and the Norris Cotton Cancer Center, Lebanon, NH 03756, USA
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Chia SK, Speers CH, Bryce CJ, Hayes MM, Olivotto IA. Ten-Year Outcomes in a Population-Based Cohort of Node-Negative, Lymphatic, and Vascular Invasion–Negative Early Breast Cancers Without Adjuvant Systemic Therapies. J Clin Oncol 2004; 22:1630-7. [PMID: 15117985 DOI: 10.1200/jco.2004.09.070] [Citation(s) in RCA: 117] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
PurposeTo discuss the absolute benefits from adjuvant systemic therapy knowledge of long-term outcomes and baseline risks of relapse and disease-specific survival are required. We assessed the 10-year outcomes in a population-based cohort of node-negative (N−) lymphovascular negative (LV−) early breast cancers diagnosed from 1989 to 1991 who did not receive adjuvant systemic therapy.MethodsOne thousand one hundred eighty-seven cases of pT1–2N0LV− breast cancers with a median follow-up of 10.4 years were reviewed. Kaplan-Meier survival curves for relapse free survival (RFS), breast cancer–specific survival (BCSS) and overall survival (OS) were compared with log-rank tests with cohorts stratified for tumor size and grade.ResultsThe median age of this series was 62 years. Four hundred thirty tumors were ≤ 1 cm in diameter (cohort 1), 507 were 1.1–2 cm (cohort 2), and 250 were 2.1 to 5 cm in diameter (cohort 3). The 10-year outcomes for cohorts 1, 2, and 3, respectively, were significantly different: RFS, 82%, 75%, and 66%; BCSS, 92%, 90%, and 77%; and OS, 79%, 78%, and 66%. Tumor grade significantly altered outcome within size cohorts, particularly in pT1N0breast cancers.ConclusionThis study provides detailed information on the continued relapse and breast cancer death rate to 10 years of follow-up. Specifically, without adjuvant systemic therapy, patients with LV−, N − breast cancer had a ≥ 25% 10-year risk of relapse and a corresponding 10-year breast cancer death rate of ≥ 10% if they had either a grade 3 tumor ≤ 1 cm, a grade 2 to 3 tumor from 1.1 to 2 cm, or any grade tumor greater than 2 cm.
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Affiliation(s)
- Stephen K Chia
- Division of Medical Oncology, Breast Cancer Outcomes Unit, British Columbia Cancer Agency, 600 West 10th Ave, Vancouver, BC Canada, V5Z 4E6.
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Chua B, Olivotto IA, Weir L, Kwan W, Truong P, Ragaz J. Increased use of adjuvant regional radiotherapy for node-positive breast cancer in British Columbia. Breast J 2004; 10:38-44. [PMID: 14717758 DOI: 10.1111/j.1524-4741.2004.09605.x] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
This study was to determine if the use of regional radiotherapy (RT) changed in British Columbia after publication of new randomized trial data in 1997. Women with pathologic T1-3N1, nonmetastatic breast cancer treated with a mastectomy or breast-conserving surgery (BCS) were included. The use of regional RT was compared in two cohorts: cohort 1, July 1, 1995-June 30, 1997 (n = 834); and cohort 2, July 1, 1998-June 30, 2000 (n = 1072). All p-values were two-sided. Adjuvant systemic therapy was given to 96% and 95% of women in cohorts 1 and 2, respectively. Forty-five percent of cohort 1 and 48% of cohort 2 had BCS. Regional RT was received by 44% of cohort 1 and 66% of cohort 2 (p < 0.001). Eighty-eight percent and 90% of women with four or more positive nodes in cohorts 1 and 2 received regional RT, respectively. For women in cohorts 1 and 2 with one to three positive nodes, regional RT use increased from 32% to 54% after mastectomy, and from 23% to 59% after BCS, respectively (p < 0.001 for both). Publication of randomized trials and a coordinated guideline implementation process in British Columbia was associated with a significant increase in the use of regional RT in women with one to three positive nodes.
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Affiliation(s)
- Boon Chua
- Radiation Therapy and Systemic Therapy Programs, British Columbia Cancer Agency, Vancouver Island Center, Victoria, British Columbia, Canada
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Madlensky L, Goel V, Polzer J, Ashbury FD. Assessing the evidence for organised cancer screening programmes. Eur J Cancer 2003; 39:1648-53. [PMID: 12888358 DOI: 10.1016/s0959-8049(03)00315-0] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
The aim of this study was to review the evidence in the literature for organised cancer screening programmes. A Medline search for publications related to organised cancer screening programmes and their components was done. While there is a broad descriptive literature on various cancer screening programmes, there are few published studies that evaluate the impact of organised cancer screening. Most of the evidence to date is from Scandinavian cervical and breast cancer screening programmes. There is a moderate amount of literature that evaluates specific components of cancer screening programmes (such as quality control and recruitment). There is a substantial body of literature on organised cancer screening programmes. However, the studies tend to describe organised screening programmes rather than evaluate their effectiveness relative to opportunistic screening. Furthermore, most studies focus on individual components of organised screening programmes, rather than on the programmes as a whole. More research is needed that directly compares organised with opportunistic cancer screening.
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Affiliation(s)
- L Madlensky
- Institute of Medical Science, University of Toronto, Canada
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Hayashi AH, Silver SF, van der Westhuizen NG, Donald JC, Parker C, Fraser S, Ross AC, Olivotto IA. Treatment of invasive breast carcinoma with ultrasound-guided radiofrequency ablation. Am J Surg 2003; 185:429-35. [PMID: 12727562 DOI: 10.1016/s0002-9610(03)00061-8] [Citation(s) in RCA: 131] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
BACKGROUND Radiofrequency ablation (RFA) is a minimally invasive thermal ablation technique. This study reports the safety and efficacy of RFA as a minimally invasive strategy for breast cancers <3 cm diameter in postmenopausal women. METHODS Twenty-two postmenopausal women (aged 60 years or older) with clinical T-1N0 core biopsy proven breast cancers were studied. Thermocoagulation was undertaken using a sonographically guided RF probe under local anesthesia and sedation. The ablated tumor was resected between 1 and 2 weeks later. Endpoints were technical success, completeness of tumor kill, marginal clearance, skin damage, and patient reports of pain and procedural acceptability. RESULTS The procedure was well tolerated and cosmesis was excellent. Pathology revealed a central ablation zone surrounded by hyperemia. Coagulative necrosis was complete in 19 of 22 patients. Disease at the ablation zone margin was found in 3 patients and 5 patients had disease distant to the ablation zone consisting of multifocal tumors (2), in-transit metastasis (1), and extensive ductal carcinoma in situ with microinvasive carcinoma (2). Ninety-five percent of patients would be willing to have RFA again. CONCLUSIONS Radiofrequency ablation can be safely applied in an outpatient setting with acceptable patient tolerance. By itself, RFA cannot be considered effective local therapy. Trials to evaluate RFA complemented with breast irradiation are justified.
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Affiliation(s)
- Allen H Hayashi
- Department of Surgery, Vancouver Island Health Authority, Victoria, British Columbia, Canada.
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Olivotto IA, Chua B, Allan SJ, Speers CH, Chia S, Ragaz J. Long-term survival of patients with supraclavicular metastases at diagnosis of breast cancer. J Clin Oncol 2003; 21:851-4. [PMID: 12610184 DOI: 10.1200/jco.2003.11.105] [Citation(s) in RCA: 62] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
BACKGROUND Patients with supraclavicular metastases at diagnosis of breast cancer were classified between 1987 and 2002 as having stage M(1) breast cancer according to the tumor-node-metastasis (TNM) system. The 2003 edition of the TNM staging guidelines has classified such patients as having stage IIIC disease. To determine relative prognosis, we compared long-term survival in a population-based cohort of patients with isolated supraclavicular metastases (nodal-M(1)) to outcomes of patients with stage IIIB or M(1) (other) disease at presentation. MATERIALS AND METHODS Among patients with breast cancer and known tumor stage referred to the British Columbia Cancer Agency from 1976 to 1985, 336 IIIB, 233 M(1), and 51 nodal-M(1) patients were identified. Actuarial overall and breast cancer-specific survival rates were determined to 20 years. RESULTS Overall survival at 20 years was 13.2% for nodal-M(1) cases (95% confidence interval [CI], 5% to 26%), 9.4% for IIIB cases (95% CI, 6% to 14%), and 1.3% for M(1) (other) cases (95% CI, 0.4% to 3.5%; log-rank P <.0005). Overall survival was similar between nodal-M(1) and IIIB cases (P =.27). Breast cancer-specific survival at 20 years was 24.1% for nodal-M(1) cases (95% CI, 13% to 37%), 30.2% for IIIB cases (95% CI, 23% to 38%), and 3.9% for M(1) (other) cases (95% CI, 2% to 8%; log-rank P <.0005). Breast cancer-specific survival was significantly different for nodal-M(1) cases compared with either IIIB or M(1) (other) cases (P =.008 for both). CONCLUSION Patients with supraclavicular metastases at diagnosis have significantly better outcomes than patients with M(1) (other) disease and overall survival similar to patients with IIIB disease. Reclassification as stage IIIC is appropriate for patients with breast cancer who present with supraclavicular nodal metastases alone.
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Affiliation(s)
- Ivo A Olivotto
- Breast Cancer Outcomes Unit , Victoria, British Columbia, Canada.
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Tange UB, Jensen MB, Vejborg IMM, Rank FE, Blichert-Toft M, Mouridsen HT, Lynge E. Clinical impact of introduction of mammography screening in a non-screening country with special reference to the Copenhagen service mammography screening programme. Scand J Surg 2003; 91:293-303. [PMID: 12449474 DOI: 10.1177/145749690209100314] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Affiliation(s)
- U B Tange
- Department of Oncology, Rigshospitalet University Hospital, Copenhagen, Denmark.
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Abstract
The purpose of this study was to compare the characteristics of primary breast cancers (PBCs) and metachronous contralateral breast cancers (MCBCs). Between 1984 and 1996, 236 women treated with curative intent for PBC who developed a MCBC >6 months after initial diagnosis (without previous evidence of distant metastases) were retrospectively evaluated for clinical and pathologic characteristics and method of diagnosis of their tumors. There were more noninvasive cancers among the MCBCs than the PBCs (11.4% and 5.1%, respectively, p < 0.02). Among the invasive cancers, the mean size of the MCBCs was smaller than the PBCs (1.94 versus 2.55 cm, p < 0.001). MCBCs were more likely than PBCs to be mammographically detected (46.2% versus 19.9%, p < 0.001). Tumor size was correlated with the method of diagnosis. The mean tumor size was 1.39, 2.02, and 2.69 cm for mammogram-, physician-, and patient-detected tumors, respectively. Among patients having axillary lymph node dissections, mammogram- and physician-detected tumors were less likely to have lymph node metastases than patient-detected tumors (22.0% versus 41.2%, p < 0.005). Regular follow-up of breast cancer patients diagnoses MCBCs when they are smaller and less likely to have nodal metastases than PBCs mainly because of early mammographic detection.
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Affiliation(s)
- R S Samant
- Northeastern Ontario Regional Cancer Center, Sudbury, Canada.
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