The four clusters that comprised tumor cells with connections to inflammatory cells (TUM1, TUM6, TUM7 and TUM9) were enriched in HR-HER2+ and TNBCs, while TUM0 and TUM5 which were two clusters including tumor cells with connections to stroma cells were enriched in HR+HER2- breast cancers. The gene discussed is ERBB2; the disease is breast carcinoma.