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A Guide to Temporal Bone Dissection: Endolymphatic Sac Dissection (Part 2 of 6)

Authors

Mohamedkazim M. Alwani, MD1, 3

Jon L. Harper, BS1, 3

Rick F. Nelson, MD PhD1, 2, 3

Author Affiliations

Department of Otolaryngology – Head and Neck Surgery1

Department of Neurological Surgery2

Indiana University School of Medicine3

Video Description

This video shows the key steps in the dissection of the endolymphatic sac during lab dissection of the temporal bone. The goal of this video is to serve as a supplementary teaching resource for resident-level surgical trainees by demonstrating key surgical landmarks and proper lab dissection technique. This video builds on part one of our video series and demonstrates fundamentals of endolymphatic surgery including the location and appearance of the endolymphatic sac, and its relationship to the labyrinth. Key surgical landmarks demonstrated in the course of this video include: sigmoid sinus, mastoid segment of the facial nerve, retrofacial air cells, endolymphatic sac, lateral and posterior semicircular canal, and Donaldson’s line

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