PRTN3 and vasculitis: Several reports showed positivity for cANCA and PR3 antibodies inpropylthiouracil-induced DIV.12-14 However, a previously reported case ofhydralazine-induced DIV by Agarwal et al. was positive for PR3 but also for MPOantibodies.15 In this context, our casenumber 1 is the first reported case of hydralazine-induced isolated cANCA, PR3positive vasculitis.