16 December 2025
: Case report 
Subdural Empyema and Pneumocephalus From Chronic Polypoid Sinusitis in an Elderly Woman With Rapid Neurological Recovery: A Report of a Rare Case
Challenging differential diagnosis, Management of emergency care, Rare coexistence of disease or pathology
John Martinez ABCDEF 1*, Elizabeth Nagidi BCEF 1, Mark Rigby
E 1, Lina Ataya E 1, Aftab Macksood E 2, Ghiath Bayasi E 3, Kelsee Rotondo E 1
DOI: 10.12659/AJCR.949999
Am J Case Rep 2025; 26:e949999
Figure 3 Pneumocephalus is visible in the extra-axial space on the initial CT scan of the brain without contrast, most often due to venous air embolus.