Polyarteritis nodosa

This study tests three standard medications—colchicine, dapsone, and azathioprine—in 90 people with isolated skin vasculitis (inflammation of small or medium blood vessels in the skin). Participants are randomly assigned to one of the drugs, and doctors track how well the skin re…

This study follows up to 4,000 people with vasculitis (a group of diseases that cause blood vessel inflammation) and healthy volunteers over many years. Researchers collect blood, urine, imaging, and genetic samples to learn how the disease develops and changes. The goal is to fi…

This study tracks the pregnancy experiences of women with vasculitis, a group of rare diseases causing blood vessel inflammation. Researchers will use online surveys to understand how vasculitis affects pregnancy and what outcomes occur. The goal is to gather information to help …

This study collects tissue samples from 1,000 people with various forms of vasculitis, a group of rare inflammatory blood vessel diseases. Researchers will analyze the samples alongside clinical data to identify genes that increase risk and to spark new ideas for diagnosis and tr…

This study looks at skin samples from 50 people with different types of vasculitis, a condition where blood vessels become inflamed. Researchers want to understand how the disease affects the skin at a molecular level. Participants must have an active skin rash related to their v…

This study collects DNA samples and medical information from 1,000 people with various forms of vasculitis (blood vessel inflammation). Researchers will analyze the data to identify genes that increase the risk of developing these severe diseases. The goal is to better understand…

This study is following 670 adults with vasculitis, a rare blood vessel disease, for up to 5 years. Researchers will collect medical data and blood samples to see how the disease starts, how it is treated, and what long-term problems may arise. No new treatments are being tested—…