Presentation
Brain CT scan for other reasons. Additional finding.
Patient Data
Age: 75 years
Gender: Female
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Enlarged right frontal sinus air cells (hyperpneumatization).
Case Discussion
Pneumosinus dilatans is a term given to enlarged paranasal sinus air cells (hyperpneumatization), which may cause pneumocephalus either by rupturing or because of a defect. It was initially described in the frontal sinuses but may involve any of the paranasal sinuses.