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Ovarian cancer among 8005 women from a breast cancer family history clinic: no increased risk of invasive ovarian cancer in families testing negative for BRCA1 and BRCA2

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Ingham, S. L., Warwick, Jane, Buchan, I., Sahin, S., O'Hara, C., Moran, A., Howell, A. and Evans, D. G. (2013) Ovarian cancer among 8005 women from a breast cancer family history clinic: no increased risk of invasive ovarian cancer in families testing negative for BRCA1 and BRCA2. Journal of Medical Genetics, Volume 50 (Number 6). pp. 368-372. doi:10.1136/jmedgenet-2013-101607

Research output not available from this repository, contact author.
Official URL: http://dx.doi.org/10.1136/jmedgenet-2013-101607

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Abstract

Background: Mutations in BRCA1/2 genes confer ovarian, alongside breast, cancer risk. We examined the risk of developing ovarian cancer in BRCA1/2-positive families and if this risk is extended to BRCA negative families.

Patients and Methods: A prospective study involving women seen at a single family history clinic in Manchester, UK. Patients were excluded if they had ovarian cancer or oophorectomy prior to clinic. Follow-up was censored at the latest date of: 31/12/2010; ovarian cancer diagnosis; oophorectomy; or death. We used person-years at risk to assess ovarian cancer rates in the study population, subdivided by genetic status (BRCA1, BRCA2, BRCA negative, BRCA untested) compared with the general population.

Results: We studied 8005 women from 895 families. Women from BRCA2 mutation families showed a 17-fold increased risk of invasive ovarian cancer (relative risk (RR) 16.67; 95% CI 5.41 to 38.89). This risk increased to 50-fold in women from families with BRCA1 mutations (RR 50.00; 95% CI 26.62 to 85.50). No association was found for women in families tested negative for BRCA1/2, where there was 1 observed invasive ovarian cancer in 1613 women when 2.74 were expected (RR 0.37; 95% CI 0.01 to 2.03). There was no association with ovarian cancer in families untested for BRCA1/2 (RR 0.99; 95% CI 0.45 to 1.88).

Discussion: This study showed no increased risk of ovarian cancer in families that tested negative for BRCA1/2 or were untested. These data help counselling women from BRCA1/2 negative families with breast cancer that their risk of invasive ovarian cancer is not higher than the general population.

Item Type: Journal Article
Divisions: Faculty of Medicine > Warwick Medical School > Health Sciences > Clinical Trials Unit
Faculty of Medicine > Warwick Medical School > Health Sciences
Faculty of Medicine > Warwick Medical School
Journal or Publication Title: Journal of Medical Genetics
Publisher: B M J Group
ISSN: 0022-2593
Official Date: June 2013
Dates:
DateEvent
June 2013Published
28 March 2013Available
10 March 2013Accepted
5 March 2013Submitted
Volume: Volume 50
Number: Number 6
Page Range: pp. 368-372
DOI: 10.1136/jmedgenet-2013-101607
Status: Peer Reviewed
Publication Status: Published
Access rights to Published version: Restricted or Subscription Access

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