ERBB2 and breast cancer: Next, we investigated the prognostic significance of lymphocyte ratio in breast cancer subtypes and found positive association between high lymphocyte ratio and favourable 10-year disease-specific survival in both Luminal A (p = 0.0087, HR = 0.32, 95% CI = [0.14, 0.75]) and HER2 subtypes (p = 0.047, HR = 0.51, 95% CI = [0.027, 0.99]).