Medians of OX40 + T lymphocyte levels in ABC patients with CB were 9.89 (IR = 28.64) at baseline vs 37.28 (IR = 43.54) cells/μl at C6; CD4 + OX40 + T were 8.32 (IR = 25.46) at baseline vs 33.22 (IR = 40.49) cells/μl at C6, and CD8 + OX40 + T were 1.85 (IR = 2.37) at baseline vs 2.63 (IR = 5.72) cells/μl at C6. Here, CD4 is linked to aneurysmal bone cyst.