1 | P-ANCA 1/320, PR3-ANCA 7.9 (NR 0–6), MPO-ANCA 13.2 (NR 0–6) | Ulcerative colitis, overlap syndrome (sclerosing cholangitis with autoimmune hepatitis) |
2 | P-ANCA 1/160, PR3-ANCA 0.4, MPO-ANCA 0.6 | Severe ulcerative colitis |
3 | P-ANCA 1/20, PR3-ANCA 2.0, MPO-ANCA 1.4 | Henoch–Schonlein purpura |
4 | C-ANCA 1/160, PR3-ANCA 1.0, MPO-ANCA 467 | Confusion, microscopic haematuria, renal biopsy not suggestive of ANCA associated vasculitis; had received high-dose IVIg prior to ANCA testing, raising the possibility of artefactual ANCA positivity due to passive transmission by IVIg6 7 |
5 | C-ANCA 1/20, PR3-ANCA 1.4, MPO-ANCA 1.7 | Diabetes, hypertension and acute renal failure secondary to ACE inhibitors |