Among the 4 tumor populations, three were HER2+ and displayed different levels of HER2 expression relative to each other high, moderate and low: cluster 2 (HER2highERnegPRposARposPD-L1highKi67pos), cluster 5 (HER2modERnegPRposARposp53highPD-L1posKi67pos) and cluster 4 (HER2lowERposPRlowARpos)). This evidence concerns the gene ERBB2 and neoplasm.