The majority of tumours were invasive ductal carcinomas (59 patients, 79.7%) and scored as grade 3 (59.5%), 32 patients had an ER-positive tumour (43.2%), 20 patients had a PgR-positive tumour (27.0%) and 35 had an ER and/or PgR-positive tumour (47.3%). This evidence concerns the gene ESR1 and invasive ductal breast carcinoma.