MPO and Increased total eosinophil count: When performing a PubMed search using the same keywords, Example 1 was identified: A 10-year-old girl with a history of recurrent cough and asthma complicated by peripheral blood eosinophilia was admitted to the hospital presenting with maculopapular rashes on her hands and feet, lung rales, laboratory findings showing elevated eosinophil count, positive anti-myelin peroxidase antibody (MPO-ANCA) test, and immunoglobulin E levels>2500 IU/mL.