MRCP2-3901

You are requested to evaluate a patient whose blood test results are as follows:
Sodium 139 mmol/L (137-144)
Potassium 4.0 mmol/L (3.5-4.9)
Creatinine 95 μmol/L (60-110)
ANA negative
cANCA positive
anti-PR3 >100
anti-MPO 3

What is the probable diagnosis for this patient?