Pneumocephalus after surgery of evacuation of subdural fluid collections.
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Axial CT shows compression and separation of the frontal lobes secondary to the presence of gas within the interhemispheric space. Lung windows shows the double-peaked silhouette of the Mount Fuji sign. There are subdural fluid collections.
2 case question available
Pneumocephalus is a common finding after surgery. Air accumulation can produces a mass effect on adjacent brain. The air pressure exceeds the surface tension of cerebrospinal fluid between the frontal lobes giving the appearance of Mount Fuji.
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