Polychondritis, Relapsing

**Definition:** 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.

**Tree numbers:** - C05.182.531 - C17.300.182.531

**Synonyms:** - Polychondritis, Chronic Atrophic