The serum OC level was lowerin the BD group than in the sham-operated group (2.93pg/mL vs. 9.47 pg/mL, respectively), while the serumCTX level was increased (152.9 ng/mL vs. 32.73 ng/mL,respectively), as was BSAP activity (15.33 U/L vs. 6.18U/L, respectively). This evidence concerns the gene PAX5 and Behcet disease.