H71.20 Cholesteatoma of mastoid, unspecified ear

Name of the Condition

• Cholesteatoma of mastoid, unspecified ear

Summary

Cholesteatoma of the mastoid, unspecified ear, is a condition involving the abnormal growth of keratinizing squamous epithelium in the mastoid air cell system, resulting in a non-cancerous but destructive lesion. This growth can erode surrounding bony structures and may lead to hearing loss or other complications. The condition often presents as a chronic or recurrent issue, requiring careful evaluation and management.

Causes

Cholesteatoma typically develops due to the migration of skin from the eardrum into the mastoid region, often secondary to chronic ear infections or eustachian tube dysfunction. Congenital factors, where skin cells are trapped during fetal development, can also contribute to its formation. In some cases, prior ear surgery or trauma may predispose to the condition.

Risk Factors

• Chronic otitis media (middle ear infection)
• Eustachian tube dysfunction
• Prior ear surgery or trauma
• Congenital abnormalities of the ear
• Recurrent ear infections in childhood

Symptoms

• Conductive hearing loss (often gradual)
• Ear pain or discomfort
• Drainage from the ear (may be foul-smelling)
• Dizziness or balance issues
• Sensation of fullness in the ear
• Possible facial nerve weakness (in advanced cases)

Diagnosis

Diagnosis is based on clinical evaluation, including otoscopic examination, and may involve imaging studies such as a CT scan to assess the extent of bony erosion. Audiometric testing can help evaluate hearing loss. The presence of keratin debris or a retraction pocket on examination may support the diagnosis.

Treatment Options

Treatment often involves surgical intervention to remove the cholesteatoma and repair any damaged structures. Medical management may include antibiotics for infections or topical treatments for drainage. Regular follow-up is necessary to monitor for recurrence.

Prognosis and Follow-Up

With appropriate treatment, outcomes are generally favorable, but recurrence is possible. Long-term follow-up is recommended to monitor for complications or regrowth. Hearing may improve after surgery, but some degree of hearing loss may persist.

Complications

• Permanent hearing loss
• Facial nerve paralysis
• Intracranial infections (e.g., meningitis, brain abscess)
• Balance disorders
• Chronic ear drainage

Lifestyle & Prevention

• Manage chronic ear infections promptly
• Avoid inserting objects into the ear
• Use hearing protection in noisy environments
• Follow up with an ear specialist for recurrent ear issues

When to Seek Professional Help

Seek medical attention if you experience persistent ear pain, drainage, hearing loss, dizziness, or facial weakness. Early evaluation can prevent complications.

Tips for Medical Coders

Document the specific ear (right, left, or bilateral) if known, as this may impact coding specificity. For unspecified ear, use H71.20. Ensure clinical documentation supports the diagnosis, including otoscopic findings or imaging results.