ERBB2 and breast cancer: There were four predominant clusters of correlated genes that were differentially expressed between the cell lines, reflecting the different phenotypes of the cell lines representing different breast cancer subtypes and ovarian cancer: MCF-7 (luminal A), BT474-M1 (luminal B), MDA-MB-231 (TNBC), SK-BR-3 (HER2 +), Caov-3 (ovarian cancer).