Granulomatosis with polyangiitis can cause periaortitis and pericarditis.

Granulomatosis with polyangiitis (GPA) is characterized by necrotizing granulomatous inflammation usually involving the upper and lower respiratory tracts and necrotizing vasculitis predominantly affecting small-sized vessels. Although categorized as a small vessel vasculitis, GPA can cause periaortitis and pericarditis. Physicians should recognize all categories of vasculitis can affect any size arteries.