Immunohistochemical (IHC) microscopic findings showed that the cellular expressions of CD3+ and CD4+ cells, two indicators of immune cells, were highest in BD-T and lowest in BD-TMSC(3h, D1/3), and significantly higher in BD-TMSC(3h) than in BD-TMSC(D1/3) (Figure 12). This evidence concerns the gene CD4 and Behcet disease.