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2 cases already this year! #Hydralazine-induced #ANCA Vasculitis 👉 Rare, but severe/rapidly progressive (DAH, RPGN-pauci immune) 👉 Polyantigenicity ➡️ ++MPO- pANCA, +PR3, ANA, dsDNA, antihistone and anti phosphospholipid Abs; low complements https: