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Retropharyngeal abscesses: a clinical and radiologic correlation
1Division of Otolaryngology, University of Sherbrooke, Fleurimont, Quebec.
The Journal of Otolaryngology
|July 20, 1999
Summary
Lateral neck X-rays are highly specific for differentiating retropharyngeal abscess from cellulitis, especially with the air sign. Computed tomography (CT) scans are useful but have limitations in distinguishing these conditions.
Area of Science:
- Radiology
- Otolaryngology
- Emergency Medicine
Background:
- Retropharyngeal abscess and cellulitis are inflammatory processes in the retropharyngeal space.
- Accurate differentiation is crucial for appropriate patient management.
Purpose of the Study:
- To evaluate the efficacy of lateral neck X-ray and computed tomography (CT) scan in distinguishing retropharyngeal cellulitis from abscess.
- To compare the diagnostic performance of these imaging modalities.
Main Methods:
- Retrospective review of 37 patient records diagnosed with retropharyngeal abscess or cellulitis.
- Analysis of sensitivity, specificity, and predictive values for lateral neck X-ray and CT scan.
- Extraction of demographic and clinical data.
Main Results:
- Lateral neck X-ray demonstrated 80% sensitivity and 100% specificity.
- CT scan showed 100% sensitivity and 45% specificity.
- Lateral neck X-ray had 100% positive and 94% negative predictive values; CT scan had 40% and 100% respectively.
Conclusions:
- CT scan is valuable for managing retropharyngeal abscess but limited in differentiating cellulitis from abscess.
- Lateral neck X-ray is highly specific, particularly when the "air sign" is present.
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