Background: - Vasculitis is a group of diseases that inflame and damage blood vessels and tissue. It can cause many medical problems. Few tests can diagnose the disease, and none can reliably predict a relapse. Researchers want to study people s genes and follow people over time to see how the disease affects them.

Summary: Vasculitis occur when the body's immune system, rather than protecting the body, attacks blood vessels, causing injury to the vessel and the part of the body it supplies with blood. Vasculitis is rare, and there are a number of different types, which can affect both adults and children. We treat vasculitis with steroids and drugs aiming to damp down the activity of the immune system, but they ofte...

Summary: Relapsing polychondritis (RP) is a rare systemic inflammatory disease characterized by recurrent inflammation of cartilage including ears, nose, tracheobronchial tree, chest wall and joints. Less commonly, it can cause inflammation of eyes, vasculature, nervous system, skin and inner ear. The purpose of this study is to study the pathogenesis of RP.