Cavernous sinus gas locules can be seen in several settings.
- iatrogenic pneumocephalus secondary to gas embolism (especially venous gas embolism) from IV access (can be a relatively common finding in the absence of direct trauma and does not require treatment)
- traumatic pneumocephalus: in the context of trauma, sphenoid or skull base fracture needs to be excluded in this context
- very rarely infection from a gas-forming organism
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- 3. Aliaksandr Anisau, Filip Vanhoenacker. Intravascular Pneumocephalus: A Mimicker of Skull Base Fractures. (2019) Journal of the Belgian Society of Radiology. 103 (1): 29. doi:10.5334/jbsr.1795 - Pubmed