is polyarteritis nodosa prognosis
Polyarteritis Nodosa. Polyarteritis nodosa (PAN) is a rare disease that results from blood vessel inflammation (vasculitis) causing injury to organ systems. The areas most commonly affected by PAN include the nerves, intestinal tract, heart, and joints.olyarteritis nodosa (PAN) is a rare disease that results from blood vessel inflammation (vasculitis) causing injury to organ systems.