Periarteritis Nodosa and Other Forms of Necrotizing Angiitis*

PATHOLOGIC conditions characterized by inflammation and fibrinoid necrosis have constituted a perplexing and controversial subject in the medical literature for many years. The tendency in recent decades to include all lesions of this morphology in the category "periarteritis nodosa" has caused much confusion. The term "necrotizing angiitis" has been suggested1 as a more appropriate name to use collectively for all vascular lesions that are characterized in their fully developed stage by inflammatory reaction and fibrinoid necrosis, since this term is noncommittal so far as etiology is concerned and is applicable to lesions in vessels of any size, both arterial and . . .