ERBB2 and breast carcinoma: Out of all breast cancer subtypes examined, TNBC had the highest WT1 expression, with WT1 expression (score > 2+) being recorded in 27 (54%) TNBC cases, but only 6 (12%) and 3 (6%) of ER-positive and HER2-positive tumour cases, respectively (Table 1) [57].