Polyarteritis nodosa

Periarteritis nodosa; PAN; Systemic necrotizing vasculitis

Polyarteritis nodosa is a serious blood vessel disease. The small and medium-sized arteries become swollen and damaged.

Microscopic polyarteritis 2

Polyarteritis nodosa, seen here on a lower extremity, produces painful, erythematous nodules. Arteries in the deep dermis and upper fat show neutrophilic infiltration.

Circulatory system

Blood used by the body is brought back to the heart and lungs by the veins of the body. Once the blood has gathered more oxygen from the lungs, it is pumped back out to the body through the arteries.

Causes

Symptoms

Exams and Tests

Treatment

Outlook (Prognosis)

Possible Complications

When to Contact a Medical Professional

Prevention