Improvement of a giant cell arteritis prediction model
Giant cell arteritis is the most common form of vasculitis diagnosed in patients older than 50 years, with a prevalence of 50 cases per 100 000 people.1 Early treatment decreases the risk of blindness, stroke, and other complications. However, giant cell arteritis can be difficult to distinguish from mimics requiring different treatments. In the USA, the standard for diagnosis is temporal artery biopsy, although imaging modalities, particularly ultrasound of the temporal and axillary arteries, are increasingly used.