TCF4 and Fuchs endothelial corneal dystrophy: In comparison to the control group, they identified 1330 DEGs in the FECD group with intronic TNR expansion in TCF4, 696 DEGs in the FECD group without intronic TNR expansion in TCF4 (602 DEGs shared with the FECD group with intronic TNR expansion), and 215 DEGs in the pre-symptomatic group (73 DEGs shared with the FECD group with intronic TNR expansion).