The 5-year OS of HR+/HER2+ IBC patients is 3.5-fold higher than that of patients with HR−/HER2− IBC, whereas HR+/HER2− and HR−/HER2+ subtypes display similar survival rates to each other but evidently lower compared to the HR+/HER2+ subtype. This evidence concerns the gene ERBB2 and inflammatory breast carcinoma.