Cancer risks in BRCA2 mutation carriers

Research output: Contribution to journalArticle

Abstract

BACKGROUND: Carriers of germline mutations in the BRCA2 gene are known to be at high risk of breast and ovarian cancers, but the risks of other cancers in mutation carriers are uncertain. We investigated these risks in 173 breast-ovarian cancer families with BRCA2 mutations identified at 20 centers in Europe and North America.

METHODS: Other cancer occurrence was determined in a final cohort of 3728 individuals, among whom 681 persons had breast or ovarian cancer and 3047 persons either were known mutation carriers, were first-degree relatives of known mutation carriers, or were first-degree relatives of breast or ovarian cancer patients. Incidence rates were compared with population-specific incidence rates, and relative risks (RRs) to carriers, together with 95% confidence intervals (CIs), were estimated by use of a maximum likelihood approach. Three hundred thirty-three other cancers occurred in this cohort.

RESULTS: Statistically significant increases in risks were observed for prostate cancer (estimated RR = 4.65; 95% CI = 3.48-6.22), pancreatic cancer (RR = 3.51; 95% CI = 1. 87-6.58), gallbladder and bile duct cancer (RR = 4.97; 95% CI = 1. 50-16.52), stomach cancer (RR = 2.59; 95%CI = 1.46-4.61), and malignant melanoma (RR = 2.58; 95% CI = 1.28-5.17). The RR for prostate cancer for men below the age of 65 years was 7.33 (95% CI = 4.66-11.52). Among women who had already developed breast cancer, the cumulative risks of a second, contralateral breast cancer and of ovarian cancer by the age of 70 years were estimated to be 52.3% (95% CI = 41.7%-61.0%) and 15.9% (95% CI = 8.8%-22.5%), respectively.

CONCLUSIONS: In addition to the large risks of breast and ovarian cancers, BRCA2 mutations may be associated with increased risks of several other cancers.

Details

Authors
  • Breast Cancer Linkage Consortium
Organisations
Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Cancer and Oncology

Keywords

  • Adolescent, Adult, Aged, Aged, 80 and over, Biliary Tract Neoplasms, Breast Neoplasms, Child, Child, Preschool, Europe, Female, Genes, Tumor Suppressor, Heterozygote, Humans, Infant, Male, Melanoma, Middle Aged, Mutation, Neoplasms, Neoplasms, Second Primary, North America, Ovarian Neoplasms, Pancreatic Neoplasms, Prostatic Neoplasms, Risk, Skin Neoplasms, Stomach Neoplasms
Original languageEnglish
Pages (from-to)1310-6
Number of pages7
JournalJournal of the National Cancer Institute
Volume91
Issue number15
Publication statusPublished - 1999 Aug 4
Publication categoryResearch
Peer-reviewedYes