ANLN expression correlated positively with tumour size (p = 0.006), high tumour grade (p < 0.001), Her2 status (p < 0.001), Ki67 status (p < 0.001) and invasive ductal carcinomas (IDC) (p < 0.001), while correlating negatively with age at diagnosis (p = 0.019), ER status (p < 0.001) and PR status (p = 0.049). This evidence concerns the gene ESR1 and invasive ductal breast carcinoma.