Gas in the cavernous sinus
Clinical suspicion of stroke.
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When not associated with sphenoid fractures or thromboembolic disease, gas in the cavernous sinus is an incidental finding and represents an air embolus from intravenous lines.
- Rubinstein D, Symonds D. Gas in the cavernous sinus. AJNR. American journal of neuroradiology. 15 (3): 561-6. Pubmed