RecruitingLongitudinal Study for Relapsing PolychondritisRelapsing 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.