The median expression of stromal TILs was 10% (range: 1–90), and high stromal TIL levels were associated with estrogen receptor negativity (p < 0.001, Pearson’s chi-squared test) and high tumor grade (p < 0.001, Pearson’s chi-squared test) (Supplementary Table 3). The gene discussed is ESR1; the disease is neoplasm.