We subsequently sought to identify the differentially expressed genes (DEGs) in each molecular subtype (HR+ vs TNBC, HR+ vs HER2+, HR+ vs HER2+HR+, HER2+ vs TNBC, HER2+ vs HER2+HR+, and HER2+HR+ vs TNBC) after adjusting for age (young vs old), tumor grade (GIII vs GI-II), and ethnicity (MENA vs non-MENA) using 2.0 fold change (fc) and adjusted false discovery rate (FDR) of p < 0.05. The gene discussed is ERBB2; the disease is neoplasm.