Åke Borg
Principal investigator
High risk of in-breast tumor recurrence after BRCA1/2-associated breast cancer.
Author
Summary, in English
The purpose of the study was to compare breast-conserving therapy (BCT) and mastectomy (M) in BRCA1/2 mutation carriers. Women with invasive breast cancer and a pathogenic mutation in BRCA1 or BRCA2 were included in the study (n = 162). Patients treated with BCT (n = 45) were compared with patients treated with M (n = 118). Endpoints were local recurrence as first recurrence (LR), overall survival (OS), breast cancer death, and distant recurrence. Cumulative incidence was calculated in the presence of competing risks. For calculation of hazard ratios and for multivariable analysis, cause-specific Cox proportional hazards regression was used. Compared to M, BCT was associated with an increased risk of LR in univariable analysis (HR 4.0; 95 % CI 1.6-9.8) and in multivariable analysis adjusting for tumor stage, age, and use of adjuvant chemotherapy (HR 2.9; CI 1.1-7.8). Following M, all local recurrences were seen in the first 5 years after breast cancer diagnosis. Following BCT, the rate of LR continued to be high also after the first 5 years. The cumulative incidence of LR in the BCT group was 15, 25, and 32 % after 5, 10, and 15 years, respectively. There were no significant differences between BCT and M for OS, breast cancer death, or distant recurrence. BRCA1/2 mutation carriers treated with BCT have a high risk of LR, many of which are new primary breast cancers. This must be thoroughly discussed with the patient and is an example of how rapid treatment-focused genetic testing could influence choice of treatment.
Department/s
- Division of Clinical Genetics
- Breastcancer-genetics
- Tumor microenvironment
- Medical oncology
- BioCARE: Biomarkers in Cancer Medicine improving Health Care, Education and Innovation
- EpiHealth: Epidemiology for Health
Publishing year
2014
Language
English
Pages
571-578
Publication/Series
Breast Cancer Research and Treatment
Volume
147
Issue
3
Full text
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Links
Document type
Journal article
Publisher
Springer
Topic
- Cancer and Oncology
Status
Published
ISBN/ISSN/Other
- ISSN: 1573-7217