For example, studies of patient tissue found that all metastatic tumours originating from ductal carcinoma expressed or re-expressed E-cadherin, irrespective of the E-cadherin status of the primary breast tumour, demonstrating differential expression of E-cadherin in epithelial tumour cells following MET compared with before EMT onset [109]. The gene discussed is CDH1; the disease is breast ductal adenocarcinoma.