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Updated: Jun 13, 2026
Role of Diffusion MRI Tractography in Endoscopic Endonasal Skull Base Surgery
Published on: July 5, 2021
How I do it: endoscopic endonasal transclival resection of ventral foramen magnum meningioma
Yen-Yu Lin1,2, Chien-Fu Yeh2,3, Ming-Ying Lan2,3
1Department of Neurosurgery, Neurological Institute, Taipei Veterans General Hospital, Taipei, Taiwan.
Background:
Surgical management of ventral foramen magnum meningiomas (FMMs) is challenging due to intervening neurovascular structures. The endoscopic endonasal transclival approach provides a direct access, offering a potential route to achieve Simpson Grade 1 resection while minimizing brainstem retraction.
Method:
We detail the technical nuances of a binostril, four-handed EEA for a ventral FMM. We explain the key anatomical landmarks required for safe decompression, including clival drilling limits, the identification of pre-medullary neurovascular structures, and the execution of a multilayered reconstruction.
Conclusion:
The EEA is a safe alternative for ventral FMMs in cases without significant lateral or caudal extension.
Insights
Endoscopic endonasal approach (EEA) offers a safe surgical route for ventral foramen magnum meningiomas (FMMs), minimizing brainstem retraction. This technique allows for complete tumor resection with reduced complications.
Area of Science:
- Neurosurgery
- Endoscopic Skull Base Surgery
Background:
- Ventral foramen magnum meningiomas (FMMs) present surgical challenges due to proximity to critical neurovascular structures.
- Minimizing brainstem retraction is crucial for favorable surgical outcomes.
Purpose of the Study:
- To describe the technical nuances of the endoscopic endonasal approach (EEA) for ventral FMM resection.
- To highlight key anatomical landmarks for safe decompression and multilayered reconstruction.
Main Methods:
- Detailed description of a binostril, four-handed EEA technique for ventral FMM.
- Emphasis on anatomical landmarks: clival drilling limits and pre-medullary neurovascular structures.
Main Results:
- The EEA provides direct access to ventral FMMs.
- Potential for achieving Simpson Grade 1 resection with minimal brainstem retraction.
Conclusions:
- Endoscopic endonasal approach (EEA) is a safe and effective alternative for managing ventral FMMs.
- Suitable for cases without significant lateral or caudal tumor extension.
