Using unpaired comparison analysis (T-test, 95% CI), to evaluate the significance of the difference found in tumour size between TNBC and each of the other subtypes, we showed that tumour size of TNBC was statistically different from the luminal subtype (p < 0.001) and from the HER2-OE subtype (p = 0.05). Here, ERBB2 is linked to neoplasm.