ERBB2 and cancer: Additionally, the heatmaps revealed the top 20 up‐ and down‐regulated genes between TNBC and ER+ cancer cells (Figure 2E), the top 20 up‐ and down‐regulated genes between TNBC and HER2+ cancer cells (Figure 2F), the top 20 up‐ and down‐regulated genes between TNBC and ER+ proliferating cancer cells (Figure 2F), and the top 20 up‐ and down‐regulated genes between TNBC and HER2+ proliferating cancer cells (Figure 2G).