We correlated mRNA expression levels of MeCP2 and MBD2 in tissue specimens of breast cancer patients (n=57) with the most important clinicopathological features (grading, histological type of cancer, nodal status, HER2-status, menopausal status, tumour diameter, OR and PR status, overall survival and disease-free survival). The gene discussed is ERBB2; the disease is breast carcinoma.