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Portnow LH, Choridah L, Kardinah K, Handarini T, Pijnappel R, Bluekens AMJ, Duijm LEM, Schoub PK, Smilg PS, Malek L, Leung JWT, Raza S. International Interobserver Variability of Breast Density Assessment. J Am Coll Radiol 2023; 20:671-684. [PMID: 37127220 DOI: 10.1016/j.jacr.2023.03.010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2022] [Revised: 02/22/2023] [Accepted: 03/03/2023] [Indexed: 05/03/2023]
Abstract
PURPOSE The aim of this study was to determine variability in visually assessed mammographic breast density categorization among radiologists practicing in Indonesia, the Netherlands, South Africa, and the United States. METHODS Two hundred consecutive 2-D full-field digital screening mammograms obtained from September to December 2017 were selected and retrospectively reviewed from four global locations, for a total of 800 mammograms. Three breast radiologists in each location (team) provided consensus density assessments of all 800 mammograms using BI-RADS® density categorization. Interreader agreement was compared using Gwet's AC2 with quadratic weighting across all four density categories and Gwet's AC1 for binary comparison of combined not dense versus dense categories. Variability of distribution among teams was calculated using the Stuart-Maxwell test of marginal homogeneity across all four categories and using the McNemar test for not dense versus dense categories. To compare readers from a particular country on their own 200 mammograms versus the other three teams, density distribution was calculated using conditional logistic regression. RESULTS For all 800 mammograms, interreader weighted agreement for distribution among four density categories was 0.86 (Gwet's AC2 with quadratic weighting; 95% confidence interval, 0.85-0.88), and for not dense versus dense categories, it was 0.66 (Gwet's AC1; 95% confidence interval, 0.63-0.70). Density distribution across four density categories was significantly different when teams were compared with one another and one team versus the other three teams combined (P < .001). Overall, all readers placed the largest number of mammograms in the scattered and heterogeneous categories. CONCLUSIONS Although reader teams from four different global locations had almost perfect interreader agreement in BI-RADS density categorization, variability in density distribution across four categories remained statistically significant.
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Affiliation(s)
- Leah H Portnow
- Division of Breast Imaging, Department of Radiology, Brigham and Women's Hospital, Boston, Massachusetts; and Instructor, Department of Radiology, Harvard Medical School, Boston, Massachusetts.
| | - Lina Choridah
- Vice Dean of Research and Development, Department of Radiology, Faculty of Medicine, Public Health and Nursing, Universitas Gadjah Mada, Jalan Farmako, Sekip Utara, Yogyakarta, Indonesia
| | - Kardinah Kardinah
- Director of Early Breast Cancer Detection Program for the Ministry of Health and Medical Committee Leader of Quality Assurance; Department of Radiology, Faculty of Medicine, Dharmais Cancer Hospital/National Cancer Center, Jakarta, Indonesia
| | - Triwulan Handarini
- Chair of the Radiology Medical Staff, Department of Radiology, Faculty of Medicine, Airlangga University-Dr Soetomo Academic General Hospital, Surabaya, Indonesia
| | - Ruud Pijnappel
- Department of Radiology, University Medical Center, Utrecht, the Netherlands; Professor, Utrecht University, Utrecht, the Netherlands; Chair, Dutch Expert Centre for Screening; and President, European Society of Breast Imaging
| | - Adriana M J Bluekens
- Department of Radiology, Elisabeth-TweeSteden Ziekenhuis, Tilburg, the Netherlands
| | - Lucien E M Duijm
- Department of Radiology, Canisius-Wilhelmina Ziekenhuis, Nijmegen, the Netherlands
| | - Peter K Schoub
- Department of Radiology, Parklane Radiology, Johannesburg, South Africa; Chair, Breast Imaging Society of South Africa
| | - Pamela S Smilg
- Department of Radiology, Parklane Radiology, Johannesburg, South Africa; Department of Radiology, Donald Gordon Medical Centre, Johannesburg, South Africa
| | - Liat Malek
- The Breast Wellness Centre, Johannesburg, South Africa
| | - Jessica W T Leung
- Deputy Chair, Department of Breast Imaging, Division of Diagnostic Imaging, The University of Texas MD Anderson Cancer Center, Houston, Texas; and Chair, Ultrasound Subcommittee, BI-RADS Committee, American College of Radiology. https://twitter.com/DrJessicaLeung
| | - Sughra Raza
- Department of Radiology, Beth Israel Deaconess Medical Center, Boston, Massachusetts; Dartmouth Hitchcock Medical Center, Hanover, NH; and Editor-in-Chief, Journal of Global Radiology
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Singh N, Joshi P, Singh DK, Narayan S, Gupta A. Volumetric breast density evaluation using fully automated Volpara software, its comparison with BIRADS density types and correlation with the risk of malignancy. Egypt J Radiol Nucl Med 2022. [DOI: 10.1186/s43055-022-00796-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
Abstract
Background
Mammography is currently the modality of choice for mass screening of breast cancer, although its sensitivity is low in dense breasts. Besides, higher breast density has been identified as independent risk factor so it has been conceptualized that women with dense breasts should be encouraged for supplemental screening. In this study, we aimed to estimate the distribution of volumetric breast density using fully automated Volpara software and to analyze the level of agreement between volumetric density grades and Breast Imaging Reporting and Data System (BI-RADS) density grades. We also aim to estimate the distribution of breast cancer in different VDG and to find a correlation between VDG and risk of malignancy.
Results
VDG-c was most common followed by VDG-b and BIRADS grade B was commonest followed by grade C. The density distribution was found inversely related to the age. Level of agreement between VDG and BIRADS grades was moderate (κ = 0.5890). Statistically significant correlation was noted between VDG-c and d for risk of malignancy (p < 0.001).
Conclusion
Difficulties associated with the use of BI-RADS density categories may be avoided if assessed using a fully automated volumetric method. High VDG can be considered as independent risk factor for malignancy. Thus, awareness of a woman’s breast density might be useful in determining the frequency and imaging modality for screening.
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Verburg E, van Gils CH, van der Velden BHM, Bakker MF, Pijnappel RM, Veldhuis WB, Gilhuijs KGA. Deep Learning for Automated Triaging of 4581 Breast MRI Examinations from the DENSE Trial. Radiology 2021; 302:29-36. [PMID: 34609196 DOI: 10.1148/radiol.2021203960] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Background Supplemental screening with MRI has proved beneficial in women with extremely dense breasts. Most MRI examinations show normal anatomic and physiologic variation that may not require radiologic review. Thus, ways to triage these normal MRI examinations to reduce radiologist workload are needed. Purpose To determine the feasibility of an automated triaging method using deep learning (DL) to dismiss the highest number of MRI examinations without lesions while still identifying malignant disease. Materials and Methods This secondary analysis of data from the Dense Tissue and Early Breast Neoplasm Screening, or DENSE, trial evaluated breast MRI examinations from the first screening round performed in eight hospitals between December 2011 and January 2016. A DL model was developed to differentiate between breasts with lesions and breasts without lesions. The model was trained to dismiss breasts with normal phenotypical variation and to triage lesions (Breast Imaging Reporting and Data System [BI-RADS] categories 2-5) using eightfold internal-external validation. The model was trained on data from seven hospitals and tested on data from the eighth hospital, alternating such that each hospital was used once as an external test set. Performance was assessed using receiver operating characteristic analysis. At 100% sensitivity for malignant disease, the fraction of examinations dismissed from radiologic review was estimated. Results A total of 4581 MRI examinations of extremely dense breasts from 4581women (mean age, 54.3 years; interquartile range, 51.5-59.8 years) were included. Of the 9162 breasts, 838 had at least one lesion (BI-RADS category 2-5, of which 77 were malignant) and 8324 had no lesions. At 100% sensitivity for malignant lesions, the DL model considered 90.7% (95% CI: 86.7, 94.7) of the MRI examinations with lesions to be nonnormal and triaged them to radiologic review. The DL model dismissed 39.7% (95% CI: 30.0, 49.4) of the MRI examinations without lesions. The DL model had an average area under the receiver operating characteristic curve of 0.83 (95% CI: 0.80, 0.85) in the differentiation between normal breast MRI examinations and MRI examinations with lesions. Conclusion Automated analysis of breast MRI examinations in women with dense breasts dismissed nearly 40% of MRI scans without lesions while not missing any cancers. ClinicalTrials.gov: NCT01315015 © RSNA, 2021 Online supplemental material is available for this article. See also the editorial by Joe in this issue.
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Affiliation(s)
- Erik Verburg
- From the Image Sciences Institute (E.V., B.H.M.v.d.V., K.G.A.G.), Julius Center for Health Sciences and Primary Care (C.H.v.G., M.F.B.), and Department of Radiology (R.M.P., W.B.V.), University Medical Center Utrecht, Utrecht University, Utrecht 3584 CX, the Netherlands
| | - Carla H van Gils
- From the Image Sciences Institute (E.V., B.H.M.v.d.V., K.G.A.G.), Julius Center for Health Sciences and Primary Care (C.H.v.G., M.F.B.), and Department of Radiology (R.M.P., W.B.V.), University Medical Center Utrecht, Utrecht University, Utrecht 3584 CX, the Netherlands
| | - Bas H M van der Velden
- From the Image Sciences Institute (E.V., B.H.M.v.d.V., K.G.A.G.), Julius Center for Health Sciences and Primary Care (C.H.v.G., M.F.B.), and Department of Radiology (R.M.P., W.B.V.), University Medical Center Utrecht, Utrecht University, Utrecht 3584 CX, the Netherlands
| | - Marije F Bakker
- From the Image Sciences Institute (E.V., B.H.M.v.d.V., K.G.A.G.), Julius Center for Health Sciences and Primary Care (C.H.v.G., M.F.B.), and Department of Radiology (R.M.P., W.B.V.), University Medical Center Utrecht, Utrecht University, Utrecht 3584 CX, the Netherlands
| | - Ruud M Pijnappel
- From the Image Sciences Institute (E.V., B.H.M.v.d.V., K.G.A.G.), Julius Center for Health Sciences and Primary Care (C.H.v.G., M.F.B.), and Department of Radiology (R.M.P., W.B.V.), University Medical Center Utrecht, Utrecht University, Utrecht 3584 CX, the Netherlands
| | - Wouter B Veldhuis
- From the Image Sciences Institute (E.V., B.H.M.v.d.V., K.G.A.G.), Julius Center for Health Sciences and Primary Care (C.H.v.G., M.F.B.), and Department of Radiology (R.M.P., W.B.V.), University Medical Center Utrecht, Utrecht University, Utrecht 3584 CX, the Netherlands
| | - Kenneth G A Gilhuijs
- From the Image Sciences Institute (E.V., B.H.M.v.d.V., K.G.A.G.), Julius Center for Health Sciences and Primary Care (C.H.v.G., M.F.B.), and Department of Radiology (R.M.P., W.B.V.), University Medical Center Utrecht, Utrecht University, Utrecht 3584 CX, the Netherlands
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Engler C, Paixão L, de Souza LF, Chevalier M, Nogueira MDS. Assessment of breast density in women from different regions of Brazil. Heliyon 2021; 7:e07198. [PMID: 34141946 PMCID: PMC8188371 DOI: 10.1016/j.heliyon.2021.e07198] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2021] [Revised: 04/21/2021] [Accepted: 05/28/2021] [Indexed: 12/24/2022] Open
Abstract
In many countries, there is an interest in determining the location of the women with the highest breast density. This investigation is important for optimize screening for breast cancer for women with dense breasts as other imaging modalities since 2D mammography is not very efficient on this type of breast. The objective of this study was to evaluate the variations in breast density in Brazilian women of different regions of Brazil. The mammographic images were taken from four regions of Brazil. The images, in the cranial caudal (CC) projection, were separated into intervals of compressed breast thickness (CBT) and patient age and were analysed by the software VolparaDensity, where volumetric breast density (VBD) calculations were performed. For each interval, null hypothesis tests for the mean difference between the VBD from the four regions of Brazil were performed. The paired tests indicated that there was a significant difference in the VBD of the women in the different regions of Brazil, with variations from 11.05% to 36.73%. Higher VBD was observed for women living in the Southeast region, followed by the Midwest, Northeast, and North regions. The Brazilian IBGE data show that the most urbanised region in Brazil is the Southeast, which coincides with the second highest rate of breast cancer in Brazil, according to the Brazilian National Cancer Institute (INCA). It is also known that breast cancer is strongly related to breast density; therefore, the results of this work support the data presented by federal agencies demonstrating that women living in the most urbanised region of Brazil (e.g., Southeast) present the highest breast density.
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Affiliation(s)
- Camila Engler
- Laboratory of Radioprotection Applied to Mammography, Nuclear Technology Development Center, Belo Horizonte, Brazil
| | - Lucas Paixão
- Anatomy and Imaging Department, Faculty of Medicine, Federal University of Minas Gerais, Belo Horizonte, Brazil
| | - Luiza Freire de Souza
- Laboratory of Radioprotection Applied to Mammography, Nuclear Technology Development Center, Belo Horizonte, Brazil
| | | | - Maria do Socorro Nogueira
- Laboratory of Radioprotection Applied to Mammography, Nuclear Technology Development Center, Belo Horizonte, Brazil
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Yamamuro M, Asai Y, Hashimoto N, Yasuda N, Ozaki Y, Ishii K, Lee Y. The effect of breast density on the missed lesion rate in screening digital mammography determined using an adjustable-density breast phantom tailored to Japanese women. PLoS One 2021; 16:e0245060. [PMID: 33411847 DOI: 10.1371/journal.pone.0245060] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2020] [Accepted: 12/22/2020] [Indexed: 11/19/2022] Open
Abstract
OBJECTIVE Despite the high risk of missing lesions in mammography, the missed lesion rate is yet to be clinically established. Further, no breast phantoms with adjustable breast density currently exist. We developed a novel, adjustable-density breast phantom with a composition identical to that of actual breasts, and determined the quantitative relationship between breast density and the missed lesion rate in mammography. METHODS An original breast phantom consisting of adipose- and fibroglandular-equivalent materials was developed, and a receiver operating characteristic (ROC) study was performed. Breast density, which is the fraction by weight of fibroglandular to total tissue, was adjusted to 25%, 50%, and 75% by arbitrarily mixing the two materials. Microcalcification, mass lesions, and spiculated lesions, each with unique characteristics, were inserted into the phantom. For the above-mentioned fibroglandular densities, 50 positive and 50 negative images for each lesion type were used as case samples for the ROC study. Five certified radiological technologists participated in lesion detection. RESULTS The mass-lesion detection rate, according to the area under the curve, decreased by 18.0% (p = 0.0001, 95% Confidence intervals [CI] = 0.1258 to 0.1822) and 37.8% (p = 0.0003, 95% CI = 0.2453 to 0.4031) for breast densities of 50% and 75%, respectively, compared to that for a 25% breast density. A similar tendency was observed with microcalcification; however, spiculated lesions did not follow this tendency. CONCLUSIONS We quantified the missed lesion rate in different densities of breast tissue using a novel breast phantom, which is imperative for advancing individualized screening mammography.
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de Munck L, Siesling S, Fracheboud J, den Heeten GJ, Broeders MJM, de Bock GH. Impact of mammographic screening and advanced cancer definition on the percentage of advanced-stage cancers in a steady-state breast screening programme in the Netherlands. Br J Cancer 2020; 123:1191-7. [PMID: 32641863 DOI: 10.1038/s41416-020-0968-6] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2020] [Revised: 06/09/2020] [Accepted: 06/18/2020] [Indexed: 11/13/2022] Open
Abstract
Background To estimate the percentages of advanced-stage breast cancers (BCs) detected during the course of a steady-state screening programme when using different definitions of advanced BC. Methods Data of women aged 49–74 years, diagnosed with BC in 2006–2015, were selected from the Netherlands Cancer Registry and linked to the screening registry. BCs were classified as screen-detected, interval or non-screened. Three definitions of advanced BC were used for comparison: TNM stage (III–IV), NM stage (N+ and/or M+) and T size (invasive tumour ≥15 mm). Analyses were performed assuming a 10% overdiagnosis rate. In sensitivity analyses, this assumption varied from 0 to 30%. Results We included 46,734 screen-detected, 17,362 interval and 24,189 non-screened BCs. By TNM stage, 4.9% of screen-detected BCs were advanced, compared with 19.4% and 22.8% of interval and non-screened BCs, respectively (p < 0.001). Applying the other definitions led to higher percentages of advanced BC being detected. Depending on the definition interval, non-screened BCs had a 2–5-times risk of being advanced. Conclusion Irrespective of the definition, screen-detected BCs were less frequently in the advanced stage. These findings provide evidence of a stage shift to early detection and support the potential of mammographic screening to reduce treatment-related burdens and the mortality associated with BC.
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McLean K, Darcey E, Cadby G, Lund H, Pilkington L, Redfern A, Thompson S, Saunders C, Wylie E, Stone J. The distribution and determinants of mammographic density measures in Western Australian aboriginal women. Breast Cancer Res 2019; 21:33. [PMID: 30819215 PMCID: PMC6393976 DOI: 10.1186/s13058-019-1113-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2018] [Accepted: 02/01/2019] [Indexed: 11/27/2022] Open
Abstract
Background Mammographic density (MD) is an established risk factor for breast cancer. There are significant ethnic differences in MD measures which are consistent with those for corresponding breast cancer risk. This is the first study investigating the distribution and determinants of MD measures within Aboriginal women of Western Australia (WA). Methods Epidemiological data and mammographic images were obtained from 628 Aboriginal women and 624 age-, year of screen-, and screening location-matched non-Aboriginal women randomly selected from the BreastScreen Western Australia database. Women were cancer free at the time of their mammogram between 1989 and 2014. MD was measured using the Cumulus software. Kolmogorov-Smirnov tests were used to compare distributions of absolute dense area (DA), precent dense area (PDA), non-dense area (NDA) and total breast area between Aboriginal and non-Aboriginal women. General linear regression was used to estimate the determinants of MD, adjusting for age, NDA, hormone therapy use, family history, measures of socio-economic status and remoteness of residence for Aboriginal and non-Aboriginal women separately. Results Aboriginal women were found to have lower DA and PDA and higher NDA than non-Aboriginal women. Age (p < 0.001) was negatively associated and several socio-economic indices (p < 0.001) were positively associated with DA and PDA in Aboriginal and non-Aboriginal women. Remoteness of residence was associated with both mammographic measures but for non-Aboriginal women only. Conclusions Aboriginal women have, on average, less MD than non-Aboriginal women but the factors associated with MD are similar for both sample populations. Since reduced MD is associated with improved sensitivity of mammography, this study suggests that mammographic screening is a particularly good test for Australian Indigenous women, a population that suffers from high breast cancer mortality. Electronic supplementary material The online version of this article (10.1186/s13058-019-1113-4) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Kirsty McLean
- Centre for Genetic Origins of Health and Disease, School of Biomedical Science, Curtin University and The University of Western Australia, Perth, Western Australia, Australia
| | - Ellie Darcey
- Centre for Genetic Origins of Health and Disease, School of Biomedical Science, Curtin University and The University of Western Australia, Perth, Western Australia, Australia
| | - Gemma Cadby
- Centre for Genetic Origins of Health and Disease, School of Biomedical Science, Curtin University and The University of Western Australia, Perth, Western Australia, Australia
| | - Helen Lund
- BreastScreen Western Australia, Women and Newborn Health Service, Perth, Western Australia, Australia
| | - Leanne Pilkington
- BreastScreen Western Australia, Women and Newborn Health Service, Perth, Western Australia, Australia.,WA Country Health Service, Government of Western Australia, Perth, Western Australia, Australia
| | - Andrew Redfern
- School of Medicine, The University of Western Australia, Perth, Western Australia, Australia.,Fiona Stanley Hospital, Robin Warren Drive, Murdoch, Western Australia, Australia
| | - Sandra Thompson
- Western Australian Centre for Rural Health, School of Population and Global Health, The University of Western Australia, Geraldton, Western Australia, Australia
| | - Christobel Saunders
- School of Medicine, The University of Western Australia, Perth, Western Australia, Australia.,Fiona Stanley Hospital, Robin Warren Drive, Murdoch, Western Australia, Australia
| | - Elizabeth Wylie
- BreastScreen Western Australia, Women and Newborn Health Service, Perth, Western Australia, Australia.,School of Medicine, The University of Western Australia, Perth, Western Australia, Australia
| | - Jennifer Stone
- Centre for Genetic Origins of Health and Disease, School of Biomedical Science, Curtin University and The University of Western Australia, Perth, Western Australia, Australia. .,The Medical Research Foundation, Royal Perth Hospital, Perth, Western Australia, Australia. .,Centre for Genetic Origins of Health and Disease, Curtin University and The University of Western Australia, 35 Stirling Highway M409, Crawley, Western Australia, 6009, Australia.
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Hudson S, Vik Hjerkind K, Vinnicombe S, Allen S, Trewin C, Ursin G, dos-Santos-Silva I, De Stavola BL. Adjusting for BMI in analyses of volumetric mammographic density and breast cancer risk. Breast Cancer Res 2018; 20:156. [PMID: 30594212 PMCID: PMC6311032 DOI: 10.1186/s13058-018-1078-8] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2018] [Accepted: 11/08/2018] [Indexed: 12/20/2022] Open
Abstract
BACKGROUND Fully automated assessment of mammographic density (MD), a biomarker of breast cancer risk, is being increasingly performed in screening settings. However, data on body mass index (BMI), a confounder of the MD-risk association, are not routinely collected at screening. We investigated whether the amount of fat in the breast, as captured by the amount of mammographic non-dense tissue seen on the mammographic image, can be used as a proxy for BMI when data on the latter are unavailable. METHODS Data from a UK case control study (numbers of cases/controls: 414/685) and a Norwegian cohort study (numbers of cases/non-cases: 657/61059), both with volumetric MD measurements (dense volume (DV), non-dense volume (NDV) and percent density (%MD)) from screening-age women, were analysed. BMI (self-reported) and NDV were taken as measures of adiposity. Correlations between BMI and NDV, %MD and DV were examined after log-transformation and adjustment for age, menopausal status and parity. Logistic regression models were fitted to the UK study, and Cox regression models to the Norwegian study, to assess associations between MD and breast cancer risk, expressed as odds/hazard ratios per adjusted standard deviation (OPERA). Adjustments were first made for standard risk factors except BMI (minimally adjusted models) and then also for BMI or NDV. OPERA pooled relative risks (RRs) were estimated by fixed-effect models, and between-study heterogeneity was assessed by the I2 statistics. RESULTS BMI was positively correlated with NDV (adjusted r = 0.74 in the UK study and r = 0.72 in the Norwegian study) and with DV (r = 0.33 and r = 0.25, respectively). Both %MD and DV were positively associated with breast cancer risk in minimally adjusted models (pooled OPERA RR (95% confidence interval): 1.34 (1.25, 1.43) and 1.46 (1.36, 1.56), respectively; I2 = 0%, P >0.48 for both). Further adjustment for BMI or NDV strengthened the %MD-risk association (1.51 (1.41, 1.61); I2 = 0%, P = 0.33 and 1.51 (1.41, 1.61); I2 = 0%, P = 0.32, respectively). Adjusting for BMI or NDV marginally affected the magnitude of the DV-risk association (1.44 (1.34, 1.54); I2 = 0%, P = 0.87 and 1.49 (1.40, 1.60); I2 = 0%, P = 0.36, respectively). CONCLUSIONS When volumetric MD-breast cancer risk associations are investigated, NDV can be used as a measure of adiposity when BMI data are unavailable.
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Affiliation(s)
- Sue Hudson
- Department of Non-Communicable Disease Epidemiology, London School of Hygiene and Tropical Medicine, Keppel Street, London, WC1E 7HT UK
| | - Kirsti Vik Hjerkind
- Cancer Registry of Norway, Institute of Population-based Cancer Research, Oslo, Norway
| | - Sarah Vinnicombe
- Division of Imaging and Technology, Ninewells Hospital Medical School, University of Dundee, Dundee, DD2 1SY UK
| | - Steve Allen
- Royal Marsden NHS Foundation Trust, London, SW3 6JJ UK
| | - Cassia Trewin
- Cancer Registry of Norway, Institute of Population-based Cancer Research, Oslo, Norway
| | - Giske Ursin
- Cancer Registry of Norway, Institute of Population-based Cancer Research, Oslo, Norway
| | - Isabel dos-Santos-Silva
- Department of Non-Communicable Disease Epidemiology, London School of Hygiene and Tropical Medicine, Keppel Street, London, WC1E 7HT UK
| | - Bianca L. De Stavola
- Faculty of Population Health Sciences, Institute of Child Health, University College London, London, WC1N 1EH UK
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de Lange SV, Bakker MF, Monninkhof EM, Peeters PHM, de Koekkoek-Doll PK, Mann RM, Rutten MJCM, Bisschops RHC, Veltman J, Duvivier KM, Lobbes MBI, de Koning HJ, Karssemeijer N, Pijnappel RM, Veldhuis WB, van Gils CH. Reasons for (non)participation in supplemental population-based MRI breast screening for women with extremely dense breasts. Clin Radiol 2018; 73:759.e1-759.e9. [PMID: 29759590 DOI: 10.1016/j.crad.2018.04.002] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2018] [Accepted: 04/05/2018] [Indexed: 11/25/2022]
Abstract
AIM To determine the willingness of women with extremely dense breasts to undergo breast cancer screening with magnetic resonance imaging (MRI) in a research setting, and to examine reasons for women to participate or not. MATERIALS AND METHODS Between 2011 and 2015, 8,061 women (50-75 years) were invited for supplemental MRI as part of the Dense Tissue and Early Breast Neoplasm Screening (DENSE) trial (ClinicalTrials.gov Identifier: NCT01315015), after a negative screening mammography in the national population-based mammography screening programme. Demographics of participants and non-participants were compared. All invitees were asked to report reasons for (non)participation. Ethical approval was obtained. Participants provided written informed consent. RESULTS Of the 8,061 invitees, 66% answered that they were interested, and 59% eventually participated. Participants were on average 54-years old (interquartile range: 51-59 years), comparable to women with extremely dense breasts in the population-based screening programme (55 years). Women with higher socio-economic status (SES) were more often interested in participation than women with lower SES (68% versus 59%, p<0.001). The most frequently stated reasons for non-participation were "MRI-related inconveniences and/or self-reported contraindications to MRI" (27%) and "anxiety regarding the result of supplemental screening" (21%). "Expected personal health benefit" (68%) and "contribution to science" (43%) were the most frequent reasons for participation. CONCLUSION Of women invited for MRI because of extremely dense breasts, 59% participated. Common reasons for non-participation were "MRI-related inconveniences" and "anxiety regarding the result of supplemental screening". In case of future implementation, availability of precise evidence on benefits and harms might reduce this anxiety.
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Affiliation(s)
- S V de Lange
- Julius Center for Health Sciences and Primary Care, University Medical Center Utrecht, Utrecht University, P.O. Box 85500, 3508 GA Utrecht, The Netherlands
| | - M F Bakker
- Julius Center for Health Sciences and Primary Care, University Medical Center Utrecht, Utrecht University, P.O. Box 85500, 3508 GA Utrecht, The Netherlands
| | - E M Monninkhof
- Julius Center for Health Sciences and Primary Care, University Medical Center Utrecht, Utrecht University, P.O. Box 85500, 3508 GA Utrecht, The Netherlands
| | - P H M Peeters
- Julius Center for Health Sciences and Primary Care, University Medical Center Utrecht, Utrecht University, P.O. Box 85500, 3508 GA Utrecht, The Netherlands; Department of Epidemiology and Biostatistics, School of Public Health, Imperial College London, South Kensington Campus, London SW7 2AZ, United Kingdom
| | - P K de Koekkoek-Doll
- Department of Radiology, Antoni van Leeuwenhoek Hospital, P.O. Box 90203, 1006 BE Amsterdam, The Netherlands
| | - R M Mann
- Department of Radiology, Radboud University Medical Center, P.O. Box 9101, 6500 HB Nijmegen, The Netherlands
| | - M J C M Rutten
- Department of Radiology, Jeroen Bosch Hospital, P.O. Box 90153, 5200 ME 's-Hertogenbosch, The Netherlands
| | - R H C Bisschops
- Department of Radiology, Albert Schweitzer Hospital, P.O. Box 444, 3300 AK Dordrecht, The Netherlands
| | - J Veltman
- Department of Radiology, Hospital Group Twente (ZGT), P.O. Box 7600, 7600 SZ Almelo, The Netherlands
| | - K M Duvivier
- Department of Radiology, VU University Medical Center, P.O. Box 7057, 1007 MB Amsterdam, The Netherlands
| | - M B I Lobbes
- Department of Radiology and Nuclear Medicine, Maastricht University Medical Centre, P.O. Box 5800, 6202 AZ Maastricht, The Netherlands
| | - H J de Koning
- Department of Public Health, Erasmus Medical Center, P.O. Box 2040, 3000 CA Rotterdam, The Netherlands
| | - N Karssemeijer
- Department of Radiology, Radboud University Medical Center, P.O. Box 9101, 6500 HB Nijmegen, The Netherlands
| | - R M Pijnappel
- LRCB - Dutch Expert Centre for Screening, PO Box 6873, 6503 GJ Nijmegen, The Netherlands; Department of Radiology, University Medical Center Utrecht, Utrecht University, P.O. Box 85500, 3508 GA Utrecht, The Netherlands
| | - W B Veldhuis
- Department of Radiology, University Medical Center Utrecht, Utrecht University, P.O. Box 85500, 3508 GA Utrecht, The Netherlands
| | - C H van Gils
- Julius Center for Health Sciences and Primary Care, University Medical Center Utrecht, Utrecht University, P.O. Box 85500, 3508 GA Utrecht, The Netherlands.
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10
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de Munck L, Fracheboud J, de Bock GH, den Heeten GJ, Siesling S, Broeders MJM. Is the incidence of advanced-stage breast cancer affected by whether women attend a steady-state screening program? Int J Cancer 2018; 143:842-850. [PMID: 29574967 DOI: 10.1002/ijc.31388] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2017] [Revised: 02/26/2018] [Accepted: 02/28/2018] [Indexed: 11/05/2022]
Abstract
In this cross-sectional population-based study, we assessed the incidence of advanced breast cancer based on screening attendance. Women from the Netherlands Cancer Registry were included if aged ≥49 years and diagnosed with breast cancer between 2006 and 2011, and data were linked with the screening program. Cancers were defined as screen-related (diagnosed <24 months after screening) or nonscreened (all other breast cancers). Two cut-offs were used to define advanced breast cancer: TNM-stage (III-IV vs 0-I-II) and T-stage alone (≥15 mm vs <15 mm or DCIS). The incidence rates were adjusted for age and logistic regression was used to compare groups. Of the 72,612 included women diagnosed with breast cancer, 44,246 (61%) had screen-related breast cancer. By TNM stage, advanced cancer was almost three times as likely to be at an advanced TNM stage in the nonscreened group compared with the screen-related group (38 and 94 per 100,000, respectively; OR: 2.86, 95%CI: 2.72-3.00). By T-stage, the incidence of advanced cancer was higher overall, and in nonscreened women was significantly higher than in screened women (210 and 169 per 100,000; OR: 1.85, 95%CI: 1.78-1.93). Data on actual screening attendance showed that the incidence of advanced breast cancer was significantly higher in nonscreened women than in screened women, supporting the expectation that screening would cause a stage shift to early detection. Despite critical evaluations of breast cancer screening programs, our data show that breast cancer screening is a valuable tool that can reduce the disease burden in women.
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Affiliation(s)
- Linda de Munck
- Department of Research, Netherlands Comprehensive Cancer Organisation, Utrecht, The Netherlands.,Department of Epidemiology, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands
| | - Jacques Fracheboud
- Department of Public Health, Erasmus MC, University Medical Center Rotterdam, Rotterdam, The Netherlands
| | - Geertruida H de Bock
- Department of Epidemiology, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands
| | - Gerard J den Heeten
- Dutch Reference Centre for Screening, Nijmegen, The Netherlands.,Department of Radiology, Academic Medical Centre Amsterdam, Amsterdam, The Netherlands
| | - Sabine Siesling
- Department of Research, Netherlands Comprehensive Cancer Organisation, Utrecht, The Netherlands.,Department of Health Technology & Services Research, MIRA Institute for Biomedical Technology and Technical Medicine, University of Twente, Enschede, The Netherlands
| | - Mireille J M Broeders
- Dutch Reference Centre for Screening, Nijmegen, The Netherlands.,Radboud Institute for Health Sciences, Radboud University Medical Center, Nijmegen, The Netherlands
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11
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Abstract
The term "breast density" or mammographic density (MD) denotes those components of breast parenchyma visualised at mammography that are denser than adipose tissue. MD is composed of a mixture of epithelial and stromal components, notably collagen, in variable proportions. MD is most commonly assessed in clinical practice with the time-honoured method of visual estimation of area-based percent density (PMD) on a mammogram, with categorisation into quartiles. The computerised semi-automated thresholding method, Cumulus, also yielding area-based percent density, is widely used for research purposes; however, the advent of fully automated volumetric methods developed as a consequence of the widespread use of digital mammography (DM) and yielding both absolute and percent dense volumes, has resulted in an explosion of interest in MD recently. Broadly, the importance of MD is twofold: firstly, the presence of marked MD significantly reduces mammographic sensitivity for breast cancer, even with state-of-the-art DM. Recognition of this led to the formation of a powerful lobby group ('Are You Dense') in the US, as a consequence of which 32 states have legislated for mandatory disclosure of MD to women undergoing mammography. Secondly, it is now widely accepted that MD is in itself a risk factor for breast cancer, with a four-to sixfold increased relative risk in women with PMD in the highest quintile compared to those with PMD in the lowest quintile. Consequently, major research efforts are underway to assess whether use of MD could provide a major step forward towards risk-adapted, personalised breast cancer prevention, imaging, and treatment.
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Affiliation(s)
- S J Vinnicombe
- Cancer Research, School of Medicine, Level 7, Mailbox 4, Ninewells Hospital and Medical School, University of Dundee, Dundee DD1 9SY, UK.
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Demchig D, Mello-Thoms C, Khulan K, Ramish A, Brennan PC. Mammographic Appearances in Mongolia: Causal Factors for Varying Densities. Asian Pac J Cancer Prev 2017; 18:2425-2430. [PMID: 28952021 PMCID: PMC5720646 DOI: 10.22034/apjcp.2017.18.9.2425] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023] Open
Abstract
Objective: Mammographic density (MD) is a significant risk factor for breast cancer and an important determinant for establishing efficiency of any screening program. Currently, the distribution and influential factors of MD is unknown among Mongolian women. This work aims to characterize MD of Mongolian women. Methods: The ethical approval was obtained from Research Ethics Board of the University of Sydney (2014/973) and National Ethic Committee from Ministry of Mongolia (2015/04). We recruited 1985 women aged 16-83 from the National Cancer Center in Mongolia for whom MD and age of each woman was known. From this total group, 983 women also had additional available details on height, weight, body mass index (BMI) and area of residency. We investigated the association of each of these variables with breast density, which was assessed by using the Breast Imaging Reporting and Data System (BIRADS) lexicon. Univariate and multivariate regression analyses were conducted to explore the importance of these variables as predictors of MD. Results: Category B (33%) was the most common type of MD, whereas 25%, 18% and 24% of women belonged to the category A, C and D respectively. The univariate analysis demonstrated that, younger women had more dens breasts than their older counterparts (OR=6.8). Also, increased MD was significantly (p<0.05) associated with decreased weight (OR=4.5), increased height (OR=0.4) and lower BMI (OR=13.2). Urban women had significantly higher MD compared with rural counterparts (OR=2.2). In the multivariate analysis, 75% of variation in MD was explained by age (OR=4.5) and BMI (OR=7.3). Conclusion: A high proportion of Mongolian women have very high density breasts and age and body size are key factors determining MD among these women.
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Affiliation(s)
- D Demchig
- Medical Image Optimization and Perception Group (MIOPeG), Discipline of Medical Radiation Science, Faculty of Health Science, University of Sydney, Sydney, Australia.
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13
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Gregorio DI, Ford C, Samociuk H. Geography of breast cancer incidence according to age & birth cohorts. Spat Spatiotemporal Epidemiol 2017; 21:47-55. [PMID: 28552187 DOI: 10.1016/j.sste.2017.03.001] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/07/2016] [Revised: 02/24/2017] [Accepted: 03/16/2017] [Indexed: 12/29/2022]
Abstract
PURPOSE Geographic variation in breast cancer incidence across Connecticut was examined according to age and birth cohort -specific groups. METHODS We assigned each of 60,937 incident breast cancer cases diagnosed in Connecticut, 1986-2009, to one of 828 census tracts around the state. Global and local spatial statistics estimated rate variation across the state according to age and birth cohorts. RESULTS We found the global distribution of incidence rates across places to be more heterogeneous for younger women and later birth cohorts. Concurrently, the spatial scan identified more locations with significantly high rates that pertained to larger proportions of at-risk women within these groups. Geographic variation by age groups was more pronounced than by birth cohorts. CONCLUSION Geographic patterns of cancer incidence exhibit differences within and across age and birth cohorts. With the continued insights from descriptive epidemiology, our capacity to effectively limit spatial disparities in cancer will improve.
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Abstract
Breast cancer incidence and mortality are higher in women with a high socioeconomic status (SES). The potential to prevent death from breast cancer is therefore greater in the high SES group. This does, however, require that the effectiveness of screening in the high SES group is equal to or greater than the effectiveness in the low SES group. The aim of this study is to assess the relative effectiveness of mammographic screening on breast cancer mortality by SES.In Nijmegen, the Netherlands, women are invited to participate in biennial mammographic screening since 1975. Postal code is collected at each round and is used to calculate the SES of each woman based on the SES indicator of the Netherlands Institute for Social Research. The Dutch average was used to classify the SES score of each woman as either high or low. We designed a case-control study to investigate the effect of mammographic screening in women aged 50 to 75, 40 to 75, and 50 to 69 years, and calculated the odds ratios (ORs) and 95% confidence intervals (CIs).Among the women invited to the mammographic screening program in Nijmegen, 10% had a high SES. In women aged 50 to 75 years, the breast cancer death rate was 38% lower in screened women than in unscreened women. The ORs for women with high SES (OR 0.82, 95% CI 0.31-2.19) and low SES did not differ significantly (OR 0.61, 95% CI 0.47-0.78).Mammographic screening reduces breast cancer mortality, but we did not observe a significant difference in the relative effectiveness of screening by SES. If the effectiveness of mammographic screening is indeed not dependent on SES status, the absolute number of breast cancer deaths prevented by mammographic screening will be greater in the high SES than low SES group, because women with a high SES have a greater risk of breast cancer death.
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Affiliation(s)
- Theodora M. Ripping
- Radboud Institute for Health Sciences, Radboud University Medical Center
- Correspondence: Theodora M. Ripping, Radboud Institute of Health Sciences, Radboud University Medical Center, P.O. Box 9101 (Route 133), 6500 HB Nijmegen, the Netherlands (e-mail: )
| | | | - André L.M. Verbeek
- Radboud Institute for Health Sciences, Radboud University Medical Center
| | - Mireille J.M. Broeders
- Radboud Institute for Health Sciences, Radboud University Medical Center
- Dutch Reference Center for Screening, Nijmegen, the Netherlands
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Moshina N, Ursin G, Roman M, Sebuødegård S, Hofvind S. Positive predictive values by mammographic density and screening mode in the Norwegian Breast Cancer Screening Program. Eur J Radiol 2015; 85:248-254. [PMID: 26724673 DOI: 10.1016/j.ejrad.2015.11.030] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2015] [Revised: 11/13/2015] [Accepted: 11/22/2015] [Indexed: 11/27/2022]
Abstract
OBJECTIVE To investigate the probability of breast cancer among women recalled due to abnormal findings on the screening mammograms (PPV-1) and among women who underwent an invasive procedure (PPV-2) by mammographic density (MD), screening mode and age. METHODS We used information about 28,826 recall examinations from 26,951 subsequently screened women in the Norwegian Breast Cancer Screening Program, 1996-2010. The radiologists who performed the recall examinations subjectively classified MD on the mammograms into three categories: fatty (<30% fibroglandular tissue); medium dense (30-70%) and dense (>70%). Screening mode was defined as screen-film mammography (SFM) and full-field digital mammography (FFDM). We examined trends of PPVs by MD, screening mode and age. We used logistic regression to estimate odds ratio (OR) of screen-detected breast cancer associated with MD among women recalled, adjusting for screening mode and age. RESULTS PPV-1 and PPV-2 decreased by increasing MD, regardless of screening mode (p for trend <0.05 for both PPVs). PPV-1 and PPV-2 were statistically significantly higher for FFDM compared with SFM for women with fatty breasts. Among women recalled, the adjusted OR of breast cancer decreased with increasing MD. Compared with women with fatty breasts, the OR was 0.90 (95% CI: 0.84-0.96) for those with medium dense breasts and 0.85 (95% CI: 0.76-0.95) for those with dense breasts. CONCLUSION PPVs decreased by increasing MD. Fewer women needed to be recalled or undergo an invasive procedure to detect one breast cancer among those with fatty versus dense breasts in the screening program in Norway, 1996-2010.
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Affiliation(s)
| | - Giske Ursin
- Cancer Registry of Norway, Oslo, Norway; Institute of Basic Medical Sciences, Medical Faculty, University of Oslo, Oslo, Norway; Department of Preventive Medicine, University of Southern California, CA, USA.
| | - Marta Roman
- Cancer Registry of Norway, Oslo, Norway; Department of Women and Children's Health, Oslo University Hospital, Oslo, Norway.
| | | | - Solveig Hofvind
- Cancer Registry of Norway, Oslo, Norway; Oslo and Akershus University College of Applied Sciences, Faculty of Health Science, Oslo, Norway.
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