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Radiographic findings in progressive necrotizing "malignant" external otitis
The Laryngoscope
|March 1, 1984
Summary
Computed tomography (CT) scans effectively identify skull base involvement in malignant external otitis, guiding treatment duration. While CT tracks bony changes, radionuclide scans assess overall inflammation extent in this necrotizing otitis externa.
Area of Science:
- Radiology
- Otolaryngology
- Infectious Diseases
Background:
- Progressive necrotizing (malignant) external otitis is a severe infection.
- Accurate staging is crucial for effective treatment.
Purpose of the Study:
- To correlate radiographic findings with clinical disease severity in malignant external otitis.
- To evaluate the utility of CT scanning and radionuclide scans in managing this condition.
Main Methods:
- Review of 23 cases of progressive necrotizing external otitis.
- Correlation of clinical presentation with radiographic evaluations, including CT scans and radionuclide scans.
Main Results:
- CT scanning accurately detected subtle skull base involvement, often clinically unsuspected.
- Central skull base erosion and parapharyngeal space thickening on CT indicated advanced disease requiring prolonged antibiotic therapy.
- CT visualized soft tissue improvement but could not track resolution of skull base osteomyelitis.
- Radionuclide scans provided information on the overall inflammatory process extent.
Conclusions:
- CT scanning is valuable for diagnosing and assessing the extent of malignant external otitis, particularly skull base involvement.
- Imaging findings guide the duration of antibiotic therapy.
- A combination of imaging modalities may be necessary for comprehensive patient management.