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H80.9 – Otosclerosis, Unspecified
H80.9 is the ICD-10 code for otosclerosis, unspecified. It refers to an inner ear condition causing progressive hearing loss due to abnormal bone growth.
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H80.9 is the ICD-10 code for otosclerosis, unspecified. It refers to an inner ear condition causing progressive hearing loss due to abnormal bone growth.
What is H80.9?
The ICD-10 code H80.9 stands for Otosclerosis, unspecified. This code is used when a diagnosis of otosclerosis has been made but no further specification regarding the affected side or exact subtype is provided. Otosclerosis is a disease of the bony labyrinth of the inner ear, in which abnormal bone remodeling occurs around the stapes (stirrup bone) or cochlea, impairing the normal conduction of sound.
Causes
The exact cause of otosclerosis is not fully understood. Several contributing factors have been identified:
- Genetic predisposition: The condition often runs in families and follows an autosomal dominant inheritance pattern.
- Hormonal influences: A link with pregnancy and female sex hormones has been observed; women are more frequently affected than men.
- Viral factors: Some studies suggest a possible role of measles virus in triggering the disease.
- Immunological processes: Inflammatory and autoimmune mechanisms may also contribute.
Symptoms
The hallmark symptom of otosclerosis is slowly progressive hearing loss, which typically begins in adulthood. Other possible symptoms include:
- Tinnitus (ringing or buzzing in the ears)
- Dizziness or balance problems in later stages
- Difficulty understanding speech, especially in noisy environments
- Hearing loss that is initially often one-sided but may affect both ears over time
Diagnosis
The diagnosis of otosclerosis is established through several examinations:
- Audiometry: Hearing tests typically reveal conductive or mixed hearing loss.
- Tympanometry: Assessment of eardrum mobility and middle ear function.
- Computed tomography (CT) of the temporal bone: Imaging to visualize bony changes in the inner ear.
- ENT specialist examination: Clinical evaluation by an ear, nose, and throat specialist.
Treatment
There are two main approaches to treating otosclerosis:
Surgical Treatment
Stapedoplasty (also called stapedectomy or stapedotomy) is the surgical procedure of choice. The stiffened stapes bone is partially or fully removed and replaced with a prosthesis. This procedure significantly improves hearing in the majority of patients.
Conservative Treatment
If surgery is not possible or desired, hearing aids can effectively compensate for hearing loss. In some cases, sodium fluoride supplements are prescribed to slow disease progression, although scientific evidence for this treatment remains controversial.
Prognosis
The overall prognosis for otosclerosis is favorable, particularly when the condition is detected and treated early. Stapedoplasty achieves good to excellent outcomes in the majority of cases. Without treatment, however, hearing loss tends to progress over time.
References
- World Health Organization (WHO): International Statistical Classification of Diseases and Related Health Problems, 10th Revision (ICD-10), H80 – Otosclerosis.
- Dornhoffer JL, Lacher C. Otosclerosis: Current Concepts in Diagnosis and Treatment. Otolaryngologic Clinics of North America, 2018.
- Cureoglu S, Baylan MY, Paparella MM. Cochlear Otosclerosis. Current Opinion in Otolaryngology & Head and Neck Surgery, 2010.
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