Cited by 129BRCA gene mutations in cancerBreast Cancer Treatment StudiesMultiple and Secondary Primary Cancers

Risk of breast cancer recurrence and contralateral breast cancer in relation to BRCA1 and BRCA2 mutation status following breast-conserving surgery and radiotherapy

Kirova, Youlia M., Stoppa-Lyonnet, Dominique, Savignoni, Alexia, Sigal-Zafrani, Brigitte, Fabre, Nicolas, Fourquet, Alain·2005·European Journal of Cancer

Abstract

BRCA1 and BRCA2 germline mutations are associated with a strong risk of breast cancer, which may preclude breast-conserving treatment in carriers. This study examined whether mutation status influenced the rate of breast cancer recurrence following breast-conserving treatment. BRCA1 and BRCA2 genes were screened for germline mutations in 131 patients with a family history of breast and/or ovarian cancer, who had been treated with breast-conserving surgery and radiotherapy. The 131 patients with familial history were matched to 261 patients without, according to age at diagnosis and year of treatment. The follow-up of controls was at least equal to the time-interval between diagnosis and genetic testing in familial cases. Matched cohorts were compared according to rates of breast cancer recurrence as first event and contralateral breast cancer using log-rank tests. BRCA1/2 mutations were found in 20.6% patients with a family history. Nineteen patients had a BRCA1 mutation and 8 had a BRCA2 mutation. Breast cancers in mutation carriers were more often grade III (p<10-4) and oestrogen receptor negative (p=0.005) than tumours in both non-carriers and controls. Median follow-up for all 392 patients was 8.75 years. No significant differences in breast cancer recurrence as first event were seen between BRCA1/2 tumours and controls (p=0.47), carriers and non-carriers with a family history (p=0.96), or non-carriers and controls (p=0.10). On multivariate analysis, age was the most important factor significantly predicting for breast cancer recurrence. The rate of contralateral breast cancer was significantly increased in all patients with a family history: BRCA1/2 carriers versus controls (p=0.0003), non-carriers versus controls (p=0.0034) and carriers versus non-carriers (p=0.02). At a 9-year median follow-up, the rate of ipsilateral breast cancer recurrence was not higher in BRCA1 and BRCA2 mutation carriers than in non-carriers with a family history or sporadic cases. These results support the hypothesis that breast tumours in BRCA carriers are more sensitive to radiation. Therefore, breast-conserving treatment can be offered to these patients. However, longer follow-up is needed to ensure that the rate of new primary cancer in the treated breast does not increase in the long-term.

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Crossref · 10.1016/j.ejca.2005.02.037

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Authors
Kirova, Y. M., Stoppa-Lyonnet, D., Savignoni, A., Sigal-Zafrani, B., Fabre, N., & Fourquet, A.
Affiliations
Institut Curie (FR)
Corresponding author
Kirova, Youlia M.
Venue
European Journal of Cancer
Publisher
Elsevier BV
Published
2005-10
Volume
41
Issue
15
Pages
2304-2311
ISSN
0959-8049 (ISSN-L)
OpenAlex
W2013945615
Cited by
129
References
52
Citations by year
2026: 1 · 2025: 1 · 2024: 3 · 2023: 1 · 2022: 3 · 2021: 5 · 2020: 8 · 2019: 3 · 2018: 4 · 2017: 6 · 2016: 1 · 2015: 11 · 2014: 6 · 2013: 8 · 2012: 7
FWCI
5.03
Type
journal article
Language
en
Open access
closed
Locations
  • European Journal of Cancer (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › BRCA gene mutations in cancer
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cancer Research › Breast Cancer Treatment Studies
  • Health Sciences › Medicine › Epidemiology › Multiple and Secondary Primary Cancers
Keywords
breast cancer recurrence, contralateral breast cancer, BRCA1 mutation, BRCA2 mutation, germline mutations, breast-conserving surgery, adjuvant radiotherapy, hereditary breast cancer, radiosensitivity, estrogen receptor status, tumor grade, age as risk factor, genetic testing, family history of cancer, ovarian cancer risk
MeSH terms
Adult, Aged, Breast Neoplasms, Epidemiologic Methods, Female, Heterozygote, Humans, Middle Aged, Neoplasm Recurrence, Local, Mastectomy, Segmental, Polymerase Chain Reaction, Germ-Line Mutation, Genes, BRCA1, Genes, BRCA2

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