CC BY-NC-ND 4.0 · J Neurol Surg B 2019; 80(S 03): S304
DOI: 10.1055/s-0038-1677496
Skull Base: Operative Videos
Georg Thieme Verlag KG Stuttgart · New York

Anterior Petrosal Approach for the Resection of a Petrous Apex Meningioma with Tentorial Infiltration

Diego Mendez-Rosito
1  Department of Neurosurgery, Centro Médico Nacional 20 de Noviembre, ISSSTE, Mexico City, Mexico
› Author Affiliations
Further Information

Address for correspondence

Diego Mendez-Rosito, MD
Department of Neurosurgery, Centro Médico Nacional 20 de Noviembre
ISSSTE, Felix Cuevas, Mexico City 01900
Mexico   

Publication History

25 May 2018

11 November 2018

Publication Date:
04 February 2019 (online)

 

    Abstract

    Objective The anterior petrosal approach is an extension of the middle fossa approach, characterized by drilling of the posteromedial triangle of the middle fossa. Drilling the Kawase's rhomboid creates a surgical corridor to the posterior fossa after splitting the tentorium. We present a case of a petrous apex meningioma invading the tentorium and causing trigeminal neuralgia.

    Results The patient was positioned in a Mayfield with the head rotated. A frontotemporal incision was done. A basal craniotomy was done to allow epidural dissection. The anatomical landmarks were identified. The surgical video is analyzed together with cadaveric dissections to highlight landmarks when doing an anterior petrosectomy. The tentorium was identified and the infiltrated region was coagulated and removed. The tentorium was sharply sectioned until the free edge of the tentorium was opened. The tumor in the petrous apex was identified and removed. The trigeminal nerve was decompressed and a gross total resection was achieved with resolution of the symptoms.

    Conclusion The anterior petrosal approach is a useful corridor to remove tumors in the petrous apex that infiltrate the tentorium. A thorough knowledge of the anatomical landmarks is crucial to identify and delineate the limits of the Kawase's rhomboid. After evaluating different surgical corridors, the anterior petrosal approach allows a gross total resection including the removal of the infiltrated tentorium and a resolution of the symptoms.

    The link to the video can be found at: https://youtu.be/p4KPUnM_bww.


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    Conflict of Interest

    None declared.

    Address for correspondence

    Diego Mendez-Rosito, MD
    Department of Neurosurgery, Centro Médico Nacional 20 de Noviembre
    ISSSTE, Felix Cuevas, Mexico City 01900
    Mexico