In the CD4+ T lymphocytes subpopulations (Table 3), TCS had a lower percentage of naïve CD4+ cells (33.1% (15.9–44.3) vs 39.2% (31.4–55.7) p = 0.026) and an increased percentage of effector memory CD4+ cells (18.1% (13.5–25.8) vs 9.8% (6.8–11.6) p = 0.001). Here, CD4 is linked to Treacher-Collins syndrome.