Interestingly, the proportion of TAMs had significantly negative correlation with the KI-67 index of the patients (r = −0.82, p = 0.02, Pearson correlation), given that the KI-67 index, a clinical indicator of tumor proliferation, is often used to reflect the malignant degree of tumor, with high index representing high malignant capability (Fig. 4C). Here, MKI67 is linked to neoplasm.