This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Neuroradiology, Subject name: Radiology
Mount Fuji sign is a feature of 
Select and explain. 
A. Fahr's disease, B. Acute bleed, C. Chronic bleed, D. Tension pneumocephalous
D: Tension pneumocephalous
Answer: D: Tension pneumocephalous 
Explanation: Mount Fuji sign refers to the presence of gas (pneumocephalus) between the tips of the frontal lobes with a heaped-up appearance giving the appearance of Mount Fuji or M like appearance.