In the same cohort, SBEM was negatively associated with Ki67 and CK5/6, respectively (Fisher’s exact test, P = < 0.0001, n = 148, OR 0.232, 95% CI 0.098, 0.545; and P = < 0.0001, n = 130, OR 0.147, 95% CI 0.057, 0.381; Table 4), whereas lack of SBEM expression was associated with higher tumour grade (Fisher’s exact test, P = 0.0015, n = 139). Here, KRT5 is linked to neoplasm.