ERCC4 and xeroderma pigmentosum-Cockayne syndrome complex: Variants in the <i>ERCC4</i> gene have been described to be associated with the following autosomal recessive diseases: xeroderma pigmentosum group F (XPF), xeroderma pigmentosum type F/Cockayne syndrome (XPF/CS), Fanconi anemia complementation group Q (FANCQ), and XFE progeroid syndrome (XFEPS).