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How I do it: a purely endoscopic endonasal approach for anterior clinoidal meningioma

  • How I Do It - Tumor - Meningioma
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Abstract

Background

Surgery for anterior clinoid meningiomas (ACMs) remains challenging due to their tight adhesion to vital neurovascular and has been traditionally performed through a transcranial approach.

Method

We present the key steps of the endoscopic endonasal approach (EEA) for ACMs with a video illustration and figures. The relevant surgical anatomy is described along with the indications and limitations of this approach.

Conclusion

The EEA offers a good treatment option for selected ACMs. It allows for the removal of involved hyperostotic bone and dural attachments, early identification and control of the neurovascular structure, and avoidance of brain retraction.

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Data Availability

All data generated or analyzed during this study are included in this published article and its supplementary information files.

Abbreviations

ACMs:

Anterior clinoidal meningiomas

EEA:

Endoscopic endonasal approach

ICA:

Internal carotid artery

ACP:

Anterior clinoid process

ON:

Optic nerve

OC:

Optic canal

SOF:

Superior orbital fissure

LOCR:

Lateral opticocarotid recess

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Acknowledgements

We express our sincere appreciation to Miss Long Mei Zeng for the illustration.

Funding

This study was supported by the National Natural Science Foundation of China (grant nos. 82060246 and 81460381), the Ganpo555 Engineering Excellence of Jiangxi Science and Technology Department (2013), and the Key Research and Invention Plan of Jiangxi Science and Technology Department (20192BBG70026).

Author information

Authors and Affiliations

Authors

Contributions

Tao Hong contributed to the study conception and design. Material preparation and data collection were performed by You Yuan Bao, Li Min Xiao, and Bin Tang. The first draft of the manuscript was written by You Yuan Bao. All authors commented on previous versions of the manuscript. All authors read and approved the final manuscript.

Corresponding author

Correspondence to Tao Hong.

Ethics declarations

Ethics approval

Anatomical study with cadaver heads and human subject approval was obtained from the Institutional Ethics Committee of the First Affiliated Hospital of Nanchang University prior to the commencement of the study. The study was performed in accordance with the ethical standards as laid down in the 1964 Declaration of Helsinki and its later amendments.

Consent to participate

Informed consent was obtained from all individual participants included in the study.

Consent for publication

All the authors gave consent for the publication of the article.

Conflicts of interest

The authors declare no competing interests.

Additional information

Key points

1. The EEA provides a good treatment option for well-selected ACMs.

2. The surgical anatomy of the ACP and its relationship with adjacent structures must be fully understood from an endoscopic perspective.

3. A detailed study of preoperative neuroradiological examination including MRI and fine-cut CT images is mandatory, especially the extent of the pneumatization of the sphenoid sinus and the involvement of the OC and ACP.

4. The bone must be removed under continuous irrigation to prevent thermal damage to neurovascular structures.

5. Individualized anterior clinoidectomy is strongly recommended according to disease-specific management.

6. While the involved dura and bone are removed, the corridor to subdural lesions is also established.

7. Intraoperative neuronavigation and electrophysiological monitoring are routinely used throughout the operation.

8. In the case of significant adhesion to neurovascular structures, some tumor residues can be tolerated and may necessitate adjuvant radiosurgery.

9. A long-term follow-up is required to observe any tumor recurrence.

10. A team proficient in microvascular and endoscopic techniques is a prerequisite for the safe and successful resection of ACMs.

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This article is part of the Topical Collection on Tumor—Meningioma

You Yuan Bao contributed to this work.

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Bao, Y.Y., Xiao, L.M., Tang, B. et al. How I do it: a purely endoscopic endonasal approach for anterior clinoidal meningioma. Acta Neurochir 165, 543–548 (2023). https://doi.org/10.1007/s00701-022-05480-8

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  • DOI: https://doi.org/10.1007/s00701-022-05480-8

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