Laboratory results demonstrated leukocytosis (17,000/μL), normocytic anemia (hemoglobin 10.1 g/dL), thrombocytosis (672,000/μL), elevated inflammatory markers (CRP 145 mg/L, ESR 120 mm/h), and strongly positive perinuclear MPO-ANCA > 134 U/mL. This evidence concerns the gene MPO and thrombocytosis disease.