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Published in: Breast Cancer Research and Treatment 1/2011

01-02-2011 | Epidemiology

Bilateral breast cancer: analysis of incidence, outcome, survival and disease characteristics

Authors: Elrasheid A. H. Kheirelseid, Hanzali Jumustafa, Nicola Miller, Catherine Curran, Karl Sweeney, Carmel Malone, Ray McLaughlin, John Newell, Michael J. Kerin

Published in: Breast Cancer Research and Treatment | Issue 1/2011

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Abstract

There has been conflicting evidence on the impact of bilateral breast cancer (BBC) on the survival and management of patients. The objectives of this study were to address the incidence of BBC and to investigate its characteristics and outcome compared to unilateral cancer. Data were acquired from the prospectively maintained NUIG breast cancer database between 1988 and 2008. BBC were then categorized as synchronous (within 12 months) or metachronous (after 12 months of first tumour). SPSS was used for data analysis. The incidence of BBC in our population was 4.4% (112 of 2,524). Of those 2.1% were synchronous while 2.3% were metachronous. Compared to unilateral cases, bilateral cancer patients were younger (P = 0.021) and had smaller size (P = 0.001) and earlier stage (P < 0.001) tumours at diagnosis. We identified the HER2/neu positivity as a risk factor for developing contralateral breast tumour and ER negativity as a risk factor for developing metachronous tumours. While there was no significant difference in survival for patients with bilateral compared to unilateral tumour (P > 0.05), the synchronous tumour was associated with poorer survival (P = 0.010) in comparison to metachronous tumour. This large single-institutional experience does not support the increasing practice of prophylactic mastectomy but does justify regular follow-up with mammography for early detection of contralateral tumour.
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Metadata
Title
Bilateral breast cancer: analysis of incidence, outcome, survival and disease characteristics
Authors
Elrasheid A. H. Kheirelseid
Hanzali Jumustafa
Nicola Miller
Catherine Curran
Karl Sweeney
Carmel Malone
Ray McLaughlin
John Newell
Michael J. Kerin
Publication date
01-02-2011
Publisher
Springer US
Published in
Breast Cancer Research and Treatment / Issue 1/2011
Print ISSN: 0167-6806
Electronic ISSN: 1573-7217
DOI
https://doi.org/10.1007/s10549-010-1057-y

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