TCF4 and Fuchs endothelial corneal dystrophy: Our qPCR data, derived from 35 controls, 41 patients with FECD without the TNR expansion, and 162 patients with FECD with the TNR expansion, demonstrated that TCF4 expression is significantly higher in the FECD with TNR expansion group than in the FECD without TNR expansion group or the control group, which refuted our original hypothesis.17