PRTN3 and anti-neutrophil cytoplasmic antibody-associated vasculitis: Thirty-eight patients (21F, 17M, age 61.4 ± 10.8) with acute onset of ANCA-associated vasculitis (31 with predominant p-ANCA and 7 with c-ANCA) with renal involvement qualified for the induction immunosuppressive therapy were included in the study.