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Cranial nerve involvement in malignant external otitis: implications for clinical outcome
Navin Mani1, Holger Sudhoff, Sandeep Rajagopal
1Department of Otolaryngology and Skull Base Surgery, Addenbrooke's Hospital, Cambridge, UK.
The Laryngoscope
|May 3, 2007
Summary
Cranial nerve involvement in malignant external otitis (MEO) did not impact survival rates. While lower cranial nerve palsies fully recovered, facial nerve palsies showed limited improvement with medical treatment.
Area of Science:
- Otolaryngology
- Infectious Diseases
- Neurology
Background:
- Malignant external otitis (MEO) is a rare but life-threatening temporal bone infection.
- Elderly patients with diabetes mellitus are the primary demographic affected by MEO.
Purpose of the Study:
- To investigate the impact of cranial nerve involvement on clinical outcomes in MEO patients.
- To determine if cranial nerve involvement predicts morbidity and mortality in MEO.
Main Methods:
- Retrospective analysis of 23 MEO patients diagnosed via clinical criteria and CT scans.
- Patients received long-term, high-dose antibiotics based on Pseudomonas aeruginosa detection.
Main Results:
- Cranial nerve involvement was observed in 43.5% of patients, most commonly the facial nerve.
- Lower cranial nerve palsies resolved, but facial nerve palsies showed poor recovery with medical treatment.
- No significant difference in survival rates was found between patients with and without cranial nerve involvement.
Conclusions:
- Cranial nerve involvement in MEO does not influence patient survival with optimized medical management.
- Facial nerve palsy is a significant complication with limited recovery potential.
- Lower cranial nerve palsies demonstrate a favorable prognosis for functional recovery.
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