The immunohistochemical staining of the pathological sections from 241 patients with breast cancer revealed that approximately 44% of deficient or decreased Numb expression was noted in 25 patients with basal‐like TNBC, and its loss or decrease was associated with the degree of tumour malignancy, prognosis and 5‐year survival rate.12 The gene discussed is NUMB; the disease is breast carcinoma.