Table 3.
Biopsies compatible with vasculitis performed in patients with the diagnosis of polyarteritis nodosa or ANCA-associated vasculitides per site of involvement
| 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) | – |
a Compatible with vasculitis
EGPA Eosinophilic granulomatosis with polyangiitis, GPA Granulomatosis with polyangiitis, MPA Microscopic polyangiitis, PAN Polyarteritis nodosa