CTCF and endometrial carcinoma: Most mutations (59%) of CTCF gene in endometrial carcinomas in the uterine TCGA PanCancer study were located in the area encoding the 11 ZFs of the protein (23 of 39 samples with CTCF mutations in cases that had complete mutations, copy number alterations, and mRNA expression analysis data available, Table 2) [23].