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Hyperostosis frontalis interna mimicking Mount Fuji sign
B Prakash1, M B Pranesh, N Parimalam
1Department of Neurology, PSG Institute of Medical Sciences and Research, Avinasi Road, Pelamenu, Coimbatore-641 002, India.
The Journal of the Association of Physicians of India
|July 15, 2011
Summary
Hyperostosis frontalis interna can mimic the Mount Fuji sign on MRI scans, a critical finding in tension pneumocephalus. This case highlights the importance of considering benign conditions that resemble neurological emergencies.
Area of Science:
- Neurology
- Radiology
- Medical Imaging
Background:
- Hyperostosis frontalis interna (HFI) is a common condition characterized by thickening of the inner table of the frontal bone.
- Tension pneumocephalus is a rare but serious neurological emergency caused by air accumulation in the cranial cavity.
Observation:
- A 73-year-old female presented with imaging findings.
- Her MRI scans displayed an appearance mimicking the 'Mount Fuji sign' typically associated with tension pneumocephalus.
Findings:
- The observed 'Mount Fuji sign' on MRI was attributed to Hyperostosis frontalis interna, not pneumocephalus.
- This highlights a potential diagnostic pitfall in neuroimaging.
Implications:
- Radiologists and clinicians should be aware of HFI mimicking serious conditions like tension pneumocephalus.
- Accurate differentiation is crucial for appropriate patient management and avoiding unnecessary interventions for a neurological emergency.
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