CD8A and neoplasm: In all investigated OC-associated compartments, CD4+ T cells displayed higher percentages than CD8+ T cells (Figure 4F), with a significantly increased proportion of blood-circulating CD4+ T cells (76.77 ± 3.03% of CD3+ T cells) and least tumor-infiltrated CD4+ T cells (47.99 ± 5.20% of CD3+ cells).