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Related Experiment Video

Updated: Apr 29, 2026

Role of Diffusion MRI Tractography in Endoscopic Endonasal Skull Base Surgery

Role of Diffusion MRI Tractography in Endoscopic Endonasal Skull Base Surgery

Published on: July 5, 2021

Mount meningioma with tumor cap.

Nishant Goyal¹, Guru D Satyarthee, Aanchal Kakkar

¹All India Institute of Medical Sciences, Department of Neurosurgery, New Delhi, India.

Turkish Neurosurgery

|May 23, 2014

Summary

This study reports a rare case of parasagittal meningioma causing extreme hyperostosis, resembling a mountain. The tumor also formed a

Area of Science:

Neurosurgery
Oncology
Pathology

Background:

The link between meningioma and adjacent calvarial hyperostosis is known.
The exact cause of tumor-induced hyperostosis remains uncertain.
Previous theories include trauma, tumor irritation, osteoblast stimulation, tumor bone production, and vascular disturbances.

Observation:

A case of parasagittal meningioma is presented.
The overlying bone exhibited extreme hyperostosis, described as 'mountain-like'.
The meningioma appeared to invade through the bone, forming a 'tumor cap' over the hyperostotic bone.

Findings:

This case highlights an unusual presentation of meningioma-associated hyperostosis.
The findings suggest a complex interaction between meningioma and adjacent bone.

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The 'tumor cap' formation indicates direct tumor involvement with the hyperostotic bone.

Implications:

Further research is needed to elucidate the mechanisms behind meningioma-induced hyperostosis.
Understanding these mechanisms may improve diagnostic and therapeutic strategies for meningiomas.
This case underscores the varied and sometimes extreme bone reactions to meningiomas.