Laboratory investigations revealed consistently elevated serum IgE (320.3–936.02 IU/L, normal = 150 IU/L), eosinophilia (1.16–0.58 × 109/L, normal = 0.1–0.4 × 109/L), C-reactive protein (CRP; 20.5–4.1 mg/L, normal = 5 mg/L), and HLA-B27(+). This evidence concerns the gene CRP and Increased total eosinophil count.