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- Title
Increased Risk of Breast Cancer at a Young Age in Women with Fibrous Dysplasia.
- Authors
Majoor, Bas C. J.; Dijkstra, P. D. Sander; Boyce, Alison M.; Collins, Michael T.; Bovée, Judith V. M. G.; Smit, Vincent T. H. B. M.; Cleton‐Jansen, Anne‐Marie; Hamdy, Neveen A. T.; Appelman‐Dijkstra, Natasha M.; Dekkers, Olaf M.
- Abstract
ABSTRACT: Fibrous dysplasia (FD) is a rare bone disorder caused by mutations of the <italic>GNAS</italic> 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. <italic>GNAS</italic> 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. <italic>GNAS</italic> 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. © 2017 American Society for Bone and Mineral Research.
- Subjects
BREAST cancer risk factors; FIBROUS dysplasia of bone; GENETIC mutation
- Publication
Journal of Bone & Mineral Research, 2018, Vol 33, Issue 1, p84
- ISSN
0884-0431
- Publication type
Article
- DOI
10.1002/jbmr.3286