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Updated: Aug 18, 2026

Role of Diffusion MRI Tractography in Endoscopic Endonasal Skull Base Surgery
Published on: July 5, 2021
Sixth and tenth nerve palsy secondary to pseudomonas infection of the skull base
Sonalee Kulkarni1, Andrew Lee, John H Lee
1Department of Ophthalmology, University of Iowa Hospitals and Clinics, 200 Hawkins Drive PFP, Iowa City, IA 52242, USA. andrew-lee@uiowa.edu
Purpose:
To describe skull base osteomyelitis, an uncommon complication of chronic otitis media in the post-antibiotic era, as a cause for diplopia.
Design:
Case report.
Methods:
The records of a patient with skull base osteomyelitis were reviewed.
Results:
A patient presented with a sixth nerve palsy and tenth nerve palsy. Magnetic resonance imaging, bone scan, and gallium scan were helpful in establishing the diagnosis. Cultures grew Pseudomonas. The treatment required long-term intravenous antibiotics.
Conclusions:
Pseudomonas skull-based osteomyelitis can produce a sixth nerve palsy as a result of the involvement of the clivus. Although uncommon in the post-antibiotic era, early recognition, appropriate diagnostic testing, and aggressive systemic antibiotic treatment might prevent permanent neurologic sequel.
Insights
Skull base osteomyelitis, a rare complication of chronic otitis media, can cause double vision (diplopia) due to nerve palsies. Early diagnosis and treatment are crucial to prevent lasting neurological damage.
Area of Science:
- Otolaryngology
- Neurology
- Infectious Diseases
Background:
- Skull base osteomyelitis is an uncommon complication of chronic otitis media.
- This condition can manifest with neurological deficits, including cranial nerve palsies.
- Its occurrence in the post-antibiotic era highlights the need for continued vigilance.
Observation:
- A case report details a patient presenting with diplopia secondary to sixth and tenth cranial nerve palsies.
- Diagnostic imaging, including MRI, bone scan, and gallium scan, was instrumental in identifying skull base osteomyelitis.
- Cultures confirmed Pseudomonas as the causative pathogen.
Findings:
- Pseudomonas skull base osteomyelitis can involve the clivus, leading to sixth nerve palsy.
- The diagnosis was confirmed through a combination of clinical presentation and advanced imaging techniques.
- Treatment involved prolonged intravenous antibiotic therapy.
Implications:
- This case underscores that skull base osteomyelitis remains a potential cause of diplopia, even in the modern antibiotic era.
- Prompt recognition and comprehensive diagnostic workup are essential for effective management.
- Aggressive antibiotic treatment may prevent permanent neurological sequelae in patients with skull base osteomyelitis.
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