Indeed, higher CD8 cell densities in the tumor compartment were associated with better OS in univariate analyses in both patient subgroups (Table 2, HR = 0.37, p = 0.017 and HR = 0.38, p = 0.024 in the HER2 non-amplified and HER2-amplified groups, respectively); however, they did not provide the independent prognostic value in our models. Here, CD8A is linked to neoplasm.