IGHE and Increased total eosinophil count: Laboratory tests revealed peripheral blood eosinophilia (eosinophils: 10.3%, range: 0.0–6.0%), an elevated total serum immunoglobulin E (IgE) (level of 3188 kIU/L, range: <160 kIU/L), and elevated specific IgE against various airborne allergens (ambrosia, grass pollen, birch pollen).