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Table 3 Biopsies compatible with vasculitis performed in patients with the diagnosis of polyarteritis nodosa or ANCA-associated vasculitides per site of involvement

From: Reuma.pt/vasculitis – the Portuguese vasculitis registry

 

PAN

GPA

EGPA

MPA

Patients who underwent biopsy (N)

22

21

11

8

Positive biopsies per sitea(N/N total performed) (%)

Ear, nose and throat (ENT)

2/12 (16.7)

1/3 (33.3)

1/3 (33.3)

Kidney

3/8 (37.5)

6/8 (75.0)

Lung

0/6 (0.0)

1/2 (50.0)

Skin

13/16 (81.3)

1/2 (50.0)

3/8 (37.5)

Peripheral nerve

1/1 (100)

1/3 (33.3)

2/2 (100)

2/2 (100)

Intestine

1/1 (100)

Other

2/7 (28.6)

0/1 (0.0)

0/1 (0.0)

  1. a Compatible with vasculitis
  2. EGPA Eosinophilic granulomatosis with polyangiitis, GPA Granulomatosis with polyangiitis, MPA Microscopic polyangiitis, PAN Polyarteritis nodosa