Stapes ankylosis
Stapes ankylosis refers to congenital or acquired fixation of the stapes (the stirrup-shaped small bone or ossicle in the middle ear), which is associated with conductive hearing resulting from impairment of the sound-conduction mechanism (the external auditory canal, tympanic membrane, and/or middle-ear ossicles). [ http://www.ncbi.nlm.nih.gov/pubmed/12089654 ]
Term info
Stapes ankylosis
hposlim_core
Stapes ankylosis may be congenital or acquired, in which case it is referred to as otosclerosis. Otosclerosis is the most common cause of progressive conductive hearing loss in adults, and is generally manifested as nonsyndromic, delayed-onset, conductive hearing loss, but it may also affect the inner ear to cause sensorineural loss. Congenital stapes ankylosis may be difficult to differentiate from otosclerosis when the diagnosis of conductive hearing loss is delayed.
human_phenotype
HP:0000381