ANCA positive Vasculitis
Differential diagnosis of ANCA (Nat Rev Dis Primers 2020;6:71)
- anti-PR3:
- GPA, EGPA, microscopic polyangiitis (rarely),
- levamisole (contam. in cocaine)
- anti-MPO:
- microscopic polyangiitis, EGPA, GPA,
- drug-induced vasculitis, nonvasculitic rheumatic dis.,
- levamisole (contaminant in cocaine)
- Atypical ANCA patterns