MPO and Increased total leukocyte count: Laboratory tests at the time of onset of these additional symptoms revealed leukocytosis (6790/μL, of which 20.2% were eosinophils) and a positive myeloperoxidase-anti-neutrophil cytoplasmic antibody (MPO-ANCA) test (21 U/mL, normal: 3.5 IU/mL or less).