Cartilage Diseases [Disease/Finding] Polychondritis, Relapsing [Disease/Finding] M0017161 N0000002451 An acquired disease of unknown etiology, chronic course, and tendency to recur. It is characterized by inflammation and degeneration of cartilage and can result in deformities such as floppy ear and saddle nose. Loss of cartilage in the respiratory tract can lead to respiratory obstruction. Polychondritis, Relapsing D011081 1023111 Polychondritis, Chronic Atrophic 72275000 Polychondritis, Relapsing C0032453 C5080