Among them, four kinds of tumor-infiltrating immune cells were negatively correlated with the OS of OC patients, including M2 macrophages (p = 0.031), activated mast cells (p = 0.0033), activated memory CD4+ T cells (p = 0.04), and neutrophils (p = 0.027), whereas M1 macrophages (p = 0.00042) were positively associated with the OS of OC patients (Figure 4C). Here, CD4 is linked to neoplasm.