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Skull base osteomyelitis: diagnostic and therapeutic challenges in atypical presentation
Amar Singh1, Mazin Al Khabori, M Jamil Hyder
1Department of Otorhinolaryngology-Head and Neck Surgery and Communication Disorder, Al Nahdha Hospital, Muscat, Sultanate of Oman. ankit@omantel.net.om
Objective:
We sought to document the diagnostic and management difficulties in masked skull base osteomyelitis secondary to malignant otitis externa, with emphasis on establishing diagnostic criteria in recurrence.
Study Design:
Retrospective analysis of 3 cases of inadequately treated malignant otitis externa in elderly diabetic individuals leading to recurrence and atypical manifestations of skull base osteomyelitis on contralateral side with or without multiple cranial nerve involvement.
Results:
Two of the 3 cases died of the disease despite aggressive treatment. One case was treated successfully with combination of antipsuedamonal microbial drugs for 8 to 12 weeks and hyperbaric oxygen therapy. Major complications such as thrombosis of lateral sinus and internal jugular vein, meningitis, ophthalmoplegia, blindness, cervical spine erosion and paralysis of all cranial nerves with exception of Ist cranial nerve were observed.
Conclusion:
There is high morbidity and mortality associated with skull base osteomyelitis. In partially treated cases of malignant otitis externa, atypical symptoms and findings of unilateral severe otalgia, unremitting headache, and presence of high ESR, unilateral OME, constitute diagnostic clues of skull base osteomyelitis. Such cases require further investigation with CT, MRI, Technetium 99 and gallium 67 scintigraphy and aggressive management.
Insights
Masked skull base osteomyelitis from malignant otitis externa presents diagnostic challenges. Early recognition of atypical symptoms and advanced imaging are crucial for managing this severe condition.
Area of Science:
- Otolaryngology
- Infectious Diseases
- Radiology
Background:
- Malignant otitis externa (MOE) can lead to skull base osteomyelitis (SBOM).
- SBOM secondary to MOE presents diagnostic and management difficulties, especially in recurrent or atypical cases.
Observation:
- This study analyzed 3 elderly diabetic patients with inadequately treated MOE who developed recurrent SBOM.
- Atypical manifestations included contralateral SBOM and cranial nerve involvement.
- High morbidity and mortality were observed, with 2 of 3 patients succumbing to the disease despite aggressive treatment.
Findings:
- Recurrent SBOM in MOE cases exhibits atypical symptoms: severe otalgia, unremitting headache, elevated ESR, and unilateral otitis media with effusion.
- Diagnostic clues necessitate further investigation with CT, MRI, and nuclear scintigraphy (Technetium 99, Gallium 67).
Implications:
- Prompt diagnosis and aggressive management, including antibiotics and hyperbaric oxygen therapy, are vital for improving outcomes.
- Establishing clear diagnostic criteria for recurrent SBOM secondary to MOE is essential for timely intervention.
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