Current RMA Instruments:
| 23 of 2025 | |
|---|---|
| 24 of 2025 |
Changes from previous Instruments:
ICD Coding:
- ICD-10-AM Codes: H80
Brief description
Otosclerosis is a progressive disease characterised by abnormal bone remodelling of the otic capsule (the bony structure surrounding the inner ear). The abnormal growth can lead to the stapes (one of the middle ear bones) becoming affected and no longer vibrating properly, resulting in conductive hearing loss. Less commonly, the disease can extend further to the cochlea, leading to sensorineural hearing loss.
Confirming the diagnosis
The diagnosis will involve clinical evaluation (history of progressive hearing loss, normal tympanic membrane and no evidence of infection or other causes) and hearing tests. Sometimes imaging involving CT may be required to exclude other causes or for atypical or advanced cases.
To establish this diagnosis, the assessment and management will often require consultation with an audiologist and ENT surgeon.
Additional diagnoses covered by SOP
- Cochlear otosclerosis
- Otic capsule otosclerosis
- Otospongiosis
- Stapedial otosclerosis
Conditions not covered by SOP
- Familial otosclerosis #
* another SOP applies - the SOP has the same name unless otherwise specified
# non-SOP condition
Clinical onset
Once the diagnosis has been confirmed, clinical onset can be dated to the first presentation (e.g. hearing loss) that is judged by the treating doctor to be related to the condition. It commonly presents between the ages 15 and 45 years old.
Clinical worsening
The prognosis of otosclerosis depends on the stage of disease at diagnosis and the severity of hearing loss involved. While mild cases can be managed conservatively, severe cases benefit from surgical intervention for the best outcomes. An inability to obtain appropriate clinical management therefore can worsen this condition.