H60.23

Clinical Causes: Persistent bacterial infection, most commonly Pseudomonas aeruginosa Altered immune response or immunocompromised states Chronic otitis externa that fails to resolve Trauma or injury to the ear canal Use of contaminated ear devices or water exposure

Key Symptoms: Persistent ear pain, often severe Discharge from the ear, sometimes foul-smelling Swelling and redness of the external ear and surrounding tissue Sensorineural hearing loss or decrease in hearing capacity Facial nerve weakness or paralysis in advanced cases Fever and general malaise Tenderness upon touching the ear or behind the ear

Diagnosis Path: Diagnosis involves a combination of clinical examination, imaging studies, and laboratory tests. Otoscopic examination may reveal inflamed, swollen ear canal tissue with granulation tissue. Imaging modalities such as computed tomography (CT) scans and magnetic resonance imaging (MRI) are useful in assessing the extent of bone destruction and soft tissue involvement. Laboratory tests include blood work to check for elevated infection markers like ESR and CRP. Microbiological cultures from ear discharge help identify the causative organism.

Treatment Protocols: Managing malignant otitis externa, bilateral involvement requires a multifaceted approach. Treatment strategies typically include: - **Long-term antibiotic therapy**, often intravenous, targeted towards the identified pathogen, especially Pseudomonas aeruginosa. - **Surgical intervention** may be necessary to debride necrotic tissue or drain abscesses. - **Monitoring and supportive care**, including pain management and managing underlying conditions such as diabetes. - **Imaging follow-up** to assess response to therapy and ensure resolution. Good control of blood sugar levels in diabetic patients is crucial, as it significantly influences recovery. Close medical supervision is necessary to prevent complications like skull base involvement or cranial nerve damage.