The Spearman correlation coefficient indicated that the strongest inverse relationship was found between AR and PD-L1 in tumor cells (Pearson’s r = −0.299, p = 0.001), followed by AR and TILs (Pearson’s r = −0.248, p = 0.009), and there was no obvious correlation between PD-L1 in immune cells (p = 0.204) or Ki-67 (p = 0.793) and AR in HER2+HR− breast IDC patients. The gene discussed is MKI67; the disease is neoplasm.