Mount Fuji sign

Case contributed by Mohammad Taghi Niknejad
Diagnosis certain

Presentation

Head trauma and base skull fracture

Patient Data

Age: 25 years
Gender: Male
ct

Bilateral subdural hypoattenuating air collections cause compression and separation of the frontal lobes.

Case Discussion

The Mount Fuji sign on the brain CT scan helps discriminate tension pneumocephalus from non-tension pneumocephalus. Tension pneumocephalus can be a neurosurgical emergency.

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