Mutations in member 11 of the Solute Carrier Family 4,SLC4A11, cause congenital hereditary endothelial dystrophy (CHED, OMIM #217700)1–4, Harboyan syndrome (HS)5,6, and some cases of Fuchs endothelial corneal dystrophy (FECD, OMIM #136800)7–9. The gene discussed is SLC4A11; the disease is Fuchs endothelial corneal dystrophy.