Below is an instruction from Human. Write a response.
    ### Instruction:
    What causes Relapsing polychondritis ?
    ### Response:
    What causes relapsing polychondritis? The exact underlying cause of relapsing polychondritis (RP) is unknown. However, scientists suspect that it is an autoimmune condition. It it thought that RP occurs when the body's immune system mistakenly attacks its own cartilage and other tissues.
    