Moreover, T-ALL patients with low CD6 expression tended to have poor OS than those with high CD6 expression (HR = 0.410, 95% CI: 0.155–1.087, P = 0.064; 5-year OS: 7.1% vs. 38.2%, Figure 2(e)), and this finding was again confirmed in TCL patients (HR = 0.636, 95% CI: 0.419–0.996, P = 0.032; 5-year OS:30.3% vs. 41.8%, Figure 2(f)). Here, CD6 is linked to acute lymphoblastic leukemia.