As exemplified by CTNND1, the switching pattern between basal-like and luminal breast tumors was similarly observed in the PanCan12 Squamous Genomic Group versus PanCan12 Lung Adenocarcinoma-enriched Group, which is indicative of another common characteristic of breast basal-like and squamous tumor subtypes [25]. The gene discussed is CTNND1; the disease is breast neoplasm.