Robertson et al. (38) analyzed the published data of 2411 BCs from TCGA, UROMOL, and IMvigor 210 publication studies, and BCs were reclassified into six subtypes: neural-like (neural 22.7%), luminal-like (LUM 22.7%), papillary-like (PAP 22.7%), HER2-like (HER2L 22.7%), squamous cell carcinoma-like (SCC) (22.7%) and mesenchymal-like (MES 22.7%). This evidence concerns the gene ERBB2 and squamous cell carcinoma.