Q: What is Mount Fuji Sign?
Answer: A sign in massive pneumocephalus
A massive accumulation of air compressing the frontal lobes is called the Mount Fuji sign.
Pneumocephalus can occur after neurosurgical procedures, after trauma or spontaneously. Small amounts of air usually reabsorbed but tension pneumocephalus may occur leading to life-threatening situations.
The CT finding resembles the silhouette of a volcano, such as Mount Fuji. A “peaking” sign is also indicative of increased tension and occurs when the frontal lobes form a peak in the midline on account of intact bridging veins.
Please click on the link (in reference) to see the picture and a case report#neurology
Reference:
Josef G. Heckmann, M.D., and Oliver Ganslandt, M.D. The Mount Fuji Sign. N Engl J Med 2004; 350:1881. April 29, 2004
https://www.nejm.org/doi/full/10.1056/NEJMicm020479
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