Is polyarteritis nodosa always an autoimmune disease?

Yes.: It is an autimmine disease and can be successfully treated with drugs used to treat other autoimmune diseases.

Polyarteritis nodosa: Pan ( poly arteritis nodosa) is a disease of unknown cause.It affects small to medium sized arteries reducing or cutting off blood supply to organs . Men are affected more than women between ages of 30 to 50 . In 25% of patients hepatitis b or c infection is seen. Small and medium arteries are attacked by immune cells . It is immune mediated and exact cause is not known.

Polyarteritis causes: The answer to your question is "it may be" an auto-immune disorder. Polyarthritis is most often caused by an auto-immune disorder such as rheumatoid arthritis, amyloidosis, psoriatic arthritis, and lupus erythematosus. In addition, it may also be caused by infection with an alphavirus such as chikungunya virus and ross river virus. Ask your physician for more information in your instance.