Dawson et al (2010) recently published an evaluation of the role of oestrogen receptor (ER), progesterone receptor (PR), human epidermal growth factor receptor-2 (HER2) and B-cell lymphoma 2 (BCL2) expressions in the prognosis of breast cancer using data generated from TMAs with tumours from more than 11 000 breast cancer cases from five studies. This evidence concerns the gene PGR and neoplasm.