Analysis of data from 1081 breast cancer patients in the UALCAN database showed that those with high expression of MECP2 showed a lower probability of survival (Fig. 9E), and by comparing the expression levels of 1097 breast tumor tissues and 114 normal tissues, MECP2 was found to be upregulated in breast tumor tissues compared with normal tissues (Fig. 9F). Here, MECP2 is linked to breast carcinoma.