<unk>  is an autoimmune disease in which the body's immune system begins to attack and destroy the cartilage tissues in the body. It has been postulated that both cell-mediated immunity and humoral immunity are responsible. Reasons for disease onset are not known, but there is no evidence of a genetic predisposition to developing<unk> . However, there are cases where multiple members of the same family have been diagnosed with this illness. Studies indicate that some genetic contribution to susceptibility is likely.
Relapsing polychondritis
Rheumatoid nodulosis
Reactive arthritis
Juvenile idiopathic arthritis
Psoriatic arthritis
Discoid lupus erythematosus
Polymyalgia rheumatica
Rheumatoid arthritis