Our results showed that the DFS of HER2-low-positive BC and HER2-nonamplified BC with high levels of TILs was statistically better than that of HER2-low-positive BC, and HER2-nonamplified BC presented low levels of TILs (p = 0.015, Figure 4A; p = 0.047, Figure 4B). Here, ERBB2 is linked to breast cancer.