PRTN3 and eosinophilic granulomatosis with polyangiitis: On the other hand, some parameters make the probability of EGPA less likely and are therefore scored negatively; these parameters include a positive pattern for cytoplasmic ANCA on immunofluorescence or antiproteinase 3 (PR3)-ANCA (C-ANCA) (−3) and hematuria (−1).379