MPO and granulomatosis with polyangiitis: PR3‐ANCA (C‐ANCA) is associated mainly with GPA, and MPO‐ANCA (P‐ANCA) is associated with microscopic polyangiitis (MPA); however, as seen in our case, discordant ANCA types, such as P‐ANCA‐positive GPA, are sometimes observed in certain populations, particularly in Asia [21].