Gattey and colleagues23 described typical clinical and histologic features of FECD in four patients from three families with established DM1, and Heringer and colleagues24 reported two cases of FECD in patients with DM1 from one family, though genetic analysis of TCF4 and DMPK were not presented in either study. Here, DMPK is linked to Fuchs endothelial corneal dystrophy.