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Increased Risk of Breast Cancer at a Young Age in Women with Fibrous Dysplasia

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DOI

  • Bas C.J. Majoor, Department of Human Genetics, Leiden University Medical Center (LUMC).
  • ,
  • Alison M. Boyce, National Institute of Dental and Craniofacial Research
  • ,
  • Judith V.M.G. Bovée, Department of Human Genetics, Leiden University Medical Center (LUMC).
  • ,
  • Vincent T.H.B.M. Smit, Department of Human Genetics, Leiden University Medical Center (LUMC).
  • ,
  • Michael T. Collins, National Institute of Dental and Craniofacial Research
  • ,
  • Anne Marie Cleton-Jansen, Department of Human Genetics, Leiden University Medical Center (LUMC).
  • ,
  • Olaf M. Dekkers
  • Neveen A.T. Hamdy, Department of Human Genetics, Leiden University Medical Center (LUMC).
  • ,
  • Pd sander Dijkstra, Department of Human Genetics, Leiden University Medical Center (LUMC).
  • ,
  • Natasha M. Appelman-Dijkstra, Department of Human Genetics, Leiden University Medical Center (LUMC).

Fibrous dysplasia (FD) is a rare bone disorder caused by mutations of the GNAS gene, which are also identified in malignancies. We explored the potential relationship between breast cancer and fibrous dysplasia in two fibrous dysplasia cohorts from the Netherlands and the United States. Data on fibrous dysplasia and breast cancer diagnosis were retrieved from hospital records of 134 (Netherlands) and 121 (US) female patients. Results were validated with breast cancer data of 645 female fibrous dysplasia patients from the Dutch Pathology Registry (PALGA). Standardized morbidity ratios for breast cancer were estimated with data from Dutch and US general population registries. GNAS mutation was analyzed in 9 available breast cancer specimens. A combined total of 15 patients (6 polyostotic, 9 McCune-Albright Syndrome) had breast cancer (87% thoracic localizations). In the Netherlands, a breast cancer incidence rate of 7.5% at median age of 46 years was validated in PALGA (6.5% at age 51 years). Breast cancer risk was 3.4-fold increased (95% confidence interval [CI] 1.6–5.9) compared with the Dutch general population; OR 13.2-fold (95% CI 6.2–22.8) in thoracic disease. In the US cohort, breast cancer incidence rate was 4.5% at a median age of 36 years. Breast cancer risk was 3.9-fold increased (95% CI 1.2–8.2) compared with the general population; 5.7-fold (95% CI 1.4–13.0) in thoracic disease. GNAS mutation was positive in 4 breast cancer specimens (44%). Risk of breast cancer is increased at a younger age, particularly in polyostotic FD, suggesting that screening for breast cancer should be considered in this particular group at a younger age than currently advocated by national guidelines.

Original languageEnglish
JournalJournal of Bone and Mineral Research
Volume33
Issue1
Pages (from-to)84-90
Number of pages7
ISSN0884-0431
DOIs
Publication statusPublished - Jan 2018

    Research areas

  • BREAST CANCER, FIBROUS DYSPLASIA, G ALPHA S, GNAS MUTATION, MCCUNE-ALBRIGHT SYNDROME

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