H70.13 Chronic mastoiditis, bilateral

Name of the Condition

• Chronic mastoiditis, bilateral

Summary

Chronic mastoiditis, bilateral, is a persistent inflammation or infection of the mastoid bone located behind both ears. It typically develops as a complication of long-standing middle ear infections (otitis media) and is characterized by a prolonged course of symptoms. The condition involves the mastoid air cells and may lead to structural changes or persistent discharge if not addressed.

Causes

Chronic mastoiditis is most commonly caused by bacterial infections that spread from the middle ear, often resulting from recurrent or untreated otitis media. The infection can extend into the mastoid bone over time, leading to chronic inflammation. Other potential causes include persistent blockages in the Eustachian tube, structural abnormalities, or inadequate treatment of acute mastoiditis.

Risk Factors

• Recurrent or chronic middle ear infections
• Untreated or poorly managed otitis media
• Eustachian tube dysfunction
• Immunocompromised states
• Prior ear surgery or trauma
• Age (more common in children due to smaller Eustachian tubes)

Symptoms

• Persistent pain, swelling, or tenderness behind both ears
• Chronic ear discharge or drainage from both ears
• Hearing loss or muffled hearing in both ears
• Redness or warmth over the mastoid area on both sides
• Possible facial nerve involvement (rare)
• Headache or dizziness

Diagnosis

Diagnosis typically involves a clinical evaluation, including a physical examination of the ears and mastoid areas. Imaging studies, such as a CT scan, may be used to assess the extent of inflammation or structural changes in the mastoid bones. Laboratory tests, including cultures of ear discharge, can help identify the causative bacteria.

Treatment Options

Treatment may include long-term antibiotic therapy to address the underlying infection. In some cases, surgical intervention, such as a mastoidectomy, may be necessary to remove infected tissue or improve drainage. Pain management and monitoring for complications are also important aspects of care.

Prognosis and Follow-Up

With appropriate treatment, the prognosis for chronic mastoiditis is generally good, though recovery may be prolonged. Follow-up care is essential to monitor for recurrence or complications. Regular ear examinations and imaging studies may be recommended to ensure the condition is resolved.

Complications

Potential complications include hearing loss, facial nerve paralysis, meningitis, or the spread of infection to nearby structures. In severe cases, chronic mastoiditis can lead to bone erosion or the formation of abscesses.

Lifestyle & Prevention

Preventive measures include prompt treatment of acute ear infections, avoiding exposure to smoke, and managing allergies or Eustachian tube dysfunction. Good ear hygiene and avoiding insertion of objects into the ears can also reduce risk.

When to Seek Professional Help

Seek medical attention if symptoms persist or worsen, such as increased pain, fever, or drainage. Immediate care is needed if signs of complications, like facial weakness or severe headache, occur.

Tips for Medical Coders

When coding for chronic mastoiditis, bilateral (H70.13), ensure documentation specifies the bilateral nature of the condition. Verify that the diagnosis aligns with clinical findings and that any associated procedures or complications are appropriately coded. Accurate documentation of the affected ears and duration of symptoms is critical for correct coding.