The mean (SD) differences of serum lysozyme levels between patients with presumed sarcoidosis and AS, BD, presumed latent TB, presumed latent syphilis and control group were 6.641 (1.334), 6.394 (1.346), 5.778 (1.392), 6.785 (2.198), and 7.568 (1.756) mg/L respectively (Table 5). The gene discussed is LYZ; the disease is Behcet disease.