Polyaeritis nodosa does not involve:
Pulmonary aery
Bronchial aery
Renal aery
Cerebral aery
Polyaeritis nodosa (PAN) is a systemic vasculitis of small or medium-sized muscular aeries, typically involving renal and visceral vessels but sparing the pulmonary circulation. The most prominent morphologic feature of the affected aery is an area offibrinoid necrosis
Vasculitis