In the above-mentioned Korea-based study, in the multivariate regression analysis, being younger than 35 years of age, increased tumor diameter (> 2 cm), grade 3 status, and HR+ HER2+, TNBC, and HR− HER2+ molecular groups compared to the HR+ HER2− group, a significant correlation was found with an increased risk of death in both OS and BCSS [30]. The gene discussed is ERBB2; the disease is neoplasm.