Description

Criteria for the diagnosis of polyarteritis nodosa of the classic type were proposed at an International Consensus Conference held at the University of North Carolina, Chapel Hill, North Carolina. The diagnosis should be rare if the criteria are adhered to.


 

Lesion: necrotizing vasculitis predominantly of small and medium-sized arteries

Vessel

Involvement

venules

no

capillaries

no

arterioles

no

small arteries

yes

medium-sized arteries

yes

large arteries

possibly

 

Microscopic polyangiitis is distinguished by:

(1) presence of glomerulonephritis

(2) presence of vasculitis involving arterioles, capillaries and venules

(3) presence of pulmonary alveolar capillaritis

 


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