. 2004 Aug 18;9(1):92–97. doi: 10.1186/cc2936

Table 2.

Approximate frequencies (%) of major organ involvement

Organ system	WG	MPA	CSS	PAN
Skin	50	40	60	50
Renal	80	90	60–80	30
Pulmonary	90	50	40^a	Rare
Ear, nose and throat	90	35	50	Uncommon
Musculoskeletal	60	60	50	50–60
Neurological	30	30	70	60–70^b
GI tract	50	50	50	30
Cardiac	10		20–40	20–30

^aEvidence of pulmonary vasculitis; excludes asthma. ^bPredominantly mononeuritis multiplex. CSS, Churg–Strauss syndrome; MPA, microscopic polyangiitis; PAN, polyarteritis nodosa; WG, Wegener's granulomatosis. Data compiled from [3,18,20,26,28].