DO_rare_slim NCIthesaurus Usher syndrome Usher syndrome type 2 NCI:C126328 UMLS_CUI:C1568249 UMLS_CUI:C1568249 An Usher syndrome characterized by mild to severe congenital hearing impairment, normal vestibular function and later development of retinitis pigmentosa. DOID:0110827 ORDO:231178 MESH:D052245 SNOMEDCT_US_2021_09_01:232058008 USH2 disease_ontology