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1Service de médecine interne, Hôpital Edouard-Herriot, RECIF (Réseau d'épidémiologie clinique international francophone) Université Claude-Bernard, Lyon.
Insights
Giant cell arteritis (GCA) is a common vasculitis affecting individuals over 50. While its exact cause is unknown, genetic factors and potential environmental triggers are implicated.
Area of Science:
- Rheumatology
- Immunology
- Epidemiology
Context:
- Giant cell arteritis (GCA) is the most prevalent form of vasculitis.
- Affects individuals over 50 years old, with higher prevalence in women.
- Incidence: 10-20 cases/100,000/year; Prevalence (over 50): 100-200 cases/100,000/year.
Purpose:
- To summarize the epidemiology and known risk factors of Giant Cell Arteritis.
- To highlight the current understanding of GCA etiology.
Summary:
- GCA is the most frequent vasculitis, primarily impacting those over 50.
- Genetic predisposition, specifically HLA-DR 4, is a known factor.
- Seasonal/annual incidence peaks suggest potential infectious or environmental etiologic factors.
Impact:
- Provides a concise overview of GCA epidemiology for researchers and clinicians.
- Highlights knowledge gaps and potential research directions for GCA causes.
- Informs public health strategies and patient awareness regarding GCA risk factors.
Abstract:
Giant cell arteritis is the most frequent of all vasculitides. Estimates of its incidence lies between 10 and 20 cases/100,000/year, and estimates of its prevalence in the population over 50 between 100 and 200/100,000/year. Giant cell arteritis affects primarily patients over 50, and the increased prevalence among women, partially reflects the sex distribution in this age group. The cause of the disease remains unknown, but a genetic predisposition (HLA-DR 4 group), has been clearly shown. Seasonal, and annual peaks of incidence have been shown in some studies, suggesting an infectious or environmental etiologic factor.