In different histological types of samples, EZH2 expression was strongly correlated with NSD2 expression in IDC (Spearman correlation coefficient rs = 0.745, P < 0.001) and DCIS (Spearman correlation coefficient rs = 0.683, P < 0.05) (Table 2). The gene discussed is NSD2; the disease is ductal breast carcinoma in situ.