Osseous fixation of the malleus.
D000293:Adolescent; D000328:Adult; D000368:Aged; D001844:Bone Conduction; D002648:Child; D004429:Ear Ossicles; D005096:Exostoses; D006311:Hearing Disorders / Q000209:etiology; D006801:Humans; D008875:Middle Aged; D009999:Ossification, Heterotopic; D010040:Otosclerosis; D013201:Stapes Surgery