Llantrisant

This research aims to understand the genetic factors that contribute to the risk of giant cell arteritis (GCA) and polymyalgia rheumatica (PMR). GCA is a serious inflammatory disease affecting blood vessels, mainly in people over 50, which can cause severe complications like vision loss or stroke if untreated. PMR causes pain and stiffness in the limbs with signs of inflammation. The study involves both patients recently suspected of having GCA and those with confirmed diagnoses from the past. It seeks to provide new insights into disease causes and improve diagnosis and treatment approaches. Participants are observed in a multi-center study collecting clinical and genetic data. The study includes both prospective patients with suspected GCA and retrospective patients with confirmed GCA or PMR diagnoses. Some retrospective participants receiving tocilizumab for recurring or difficult-to-treat GCA are also included in a safety monitoring registry. Data collected include clinical features, imaging, tissue and blood samples, and advanced genetic testing. The study also follows patients over time to assess disease impact, quality of life, and long-term outcomes. During the study, participants provide medical information, biological samples, and complete questionnaires about their symptoms and quality of life. Researchers monitor disease activity and treatment effects, especially among those starting certain immune-modifying drugs. The main measurements focus on genetic susceptibility at the study start, with ongoing evaluation of diagnosis, prognosis, and disease progression. The study is designed to improve understanding and management of GCA and PMR over time.