Congenital and acquired ossicular problems.
D000293:Adolescent; D002648:Child; D003638:Deafness / Q000151:congenital / Q000209:etiology; D003937:Diagnosis, Differential; D004427:Ear Diseases / Q000150:complications / Q000151:congenital / Q000601:surgery; D006801:Humans; D010040:Otosclerosis / Q000151:congenital