Single gene mutations in mouse Eya4, Tlr4, p73, MyD88, Fas, E2f4, Plg, Fbxo11 and Evi1 give rise to chronic spontaneous OM phenotypes, in several cases as part of a spectrum of pleiotropic effects, and are candidate susceptibility genes for human OM. This evidence concerns the gene TLR4 and ocular melanoma.