SLC7A5 protein expression was associated with negative hormone receptor status and HER2+ tumours (all p ≤ 0.002, Table 3) and it was highly expressed in triple negative (TN) and basal-like phenotype malignancies compared to non-TN and non-basal-like tumours (p < 0.001, Table 3). The gene discussed is ERBB2; the disease is neoplasm.