High tumour-based lymphocyte ratio scores was associated with favourable disease-specific survival in Luminal A and HER2 subtypes but not Basal and Luminal B (Luminal A: p = 0.0087, hazard ratio (HR) = 0.32, 95% confidence interval (CI) = [0.14, 0.75]; HER2: p = 0.047, HR = 0.51, CI = [0.27, 0.99]; combined cohorts, Fig. S1). The gene discussed is ERBB2; the disease is neoplasm.