Endoscopic transcribriform resection of an olfactory groove meningioma and technical nuances
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* Peter Papagiannopoulos
* Gregory Glauser
* Nithin D Adappa
* Omar Choudhri

*   ear, nose and throat/otolaryngology
*   CNS Cancer
*   neurosurgery
*   Otolaryngology/ENT

## Description

This video illustrates a transcribriform resection of a symptomatic olfactory meningioma (figure 1). The patient described in this video is a 70-year-old man who presented with headaches and dysosmia. He was found to have an expanding olfactory meningioma on radiographic studies. Multiple treatment options were considered, including surveillance imaging, craniotomy for resection of the lesion and endoscopic transcribriform resection. For this case, endoscopic resection was the ideal treatment option as this approach avoids the need for brain retraction, with a higher chance for a Simpson Grade I Resection. The patient underwent endoscopic resection of the lesion with stereotactic navigation and extended skull base exposure with a Draf exposure and a lumbar drain in place. A few important technical nuances are addressed within this video. Of note, the bimanual microsurgical technique is useful for defining tumour margins, which is of the utmost importance in skull base procedures. Debulking is a key aspect for meningioma resection, which is accomplished through the use of microsuction in conjunction with an ultrasonic aspirator. The bimanual technique enables the surgeon to fully expose and identify the arachnoid plane around the tumour. It is critical to fully develop the arachnoid plane with a no-touch technique on the brain side before the tumour is completely released and removed. The patient made an uncomplicated recovery and was discharged to home with no neurological deficits.

![Figure 1](http://casereports.bmj.com/https://casereports.bmj.com/content/bmjcr/12/6/e230316/F1.medium.gif)

[Figure 1](http://casereports.bmj.com/content/12/6/e230316/F1)

Figure 1 
Operative view of olfactory groove meningioma.



Video 1 
Olfactory groove meningioma, endoscopic resection, transcribriform, skull base.

### Learning points

*   Endoscopic meningioma resection.

*   Extended skull base exposure.

*   Uncomplicated postoperative recovery.

## Footnotes

*   Contributors We certify that we have each made a substantial contribution as to qualify for authorship as follows: OC, NDA and PP performed the procedure, OC provided video narration, GG and PP performed critical video editing and preparation for publication.

*   Funding The authors have not declared a specific grant for this research from any funding agency in the public, commercial or not-for-profit sectors.

*   Competing interests None declared.

*   Provenance and peer review Not commissioned; externally peer reviewed.

*   Patient consent for publication Obtained.

*   Accepted May 30, 2019.


*   © BMJ Publishing Group Limited 2019. No commercial re-use. See rights and permissions. Published by BMJ.