Transmastoid exposure of the labyrinthine segment of the facial nerve: an anatomical study

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dc.contributor.authorAslan G.G.
dc.contributor.authorAslan A.
dc.contributor.authorSurucu S.
dc.date.accessioned2024-07-22T08:03:41Z
dc.date.available2024-07-22T08:03:41Z
dc.date.issued2023
dc.description.abstractIntroduction: Compression of the labyrinthine segment of the facial nerve by edema has been considered as an important pathology in the majority of the cases of idiopathic facial nerve paralysis. Hence, it is suggested that total decompression of the facial nerve should also include the labyrinthine segment by a middle fossa approach. However, the middle fossa approach requires craniotomy and temporal lobe retraction, which increases the morbidity. The labyrinthine segment of the facial nerve can also be reached through mastoidectomy. However, many ear surgeons are not familiar with this approach due to the lack of anatomical data on this surgical area. Objective: To study the anatomical limitations of decompression of the labyrinthine segment via transmastoid approach. Methods: Complete mastoidectomy was performed in six adult cadavers heads. Dissection was extended in the zygomatic root and posterior bony wall of the external auditory canal to visualize the incudomallear joint completely. The bone between tympanic segment, lateral and superior semicircular canal's ampullas and middle fossa dural plate was removed. Fine dissection was carried out over tympanic segment of the facial nerve in an anterosuperomedial direction the labyrinthine segment was reached. Results: All the mastoids were well pneumatized. Distances between the labyrinthine segment and middle fossa dura, and between the labyrinthine segment and superior semicircular canal, were 2.5 and 4.5 mm on average, respectively. In addition, distances between the middle fossa dura and dome of the lateral semicircular canal, and between the middle fossa dura and tympanic segment were 4.6 mm and 4.3 mm on average, respectively. Conclusion: It is possible to expose the labyrinthine segment of the facial nerve through mastoidectomy by dissecting the bone in the area between the tympanic segment of the facial nerve, middle fossa dural plate and ampullary ends of the lateral and superior semicircular canals. © 2021 Associação Brasileira de Otorrinolaringologia e Cirurgia Cérvico-Facial
dc.identifier.DOI-ID10.1016/j.bjorl.2021.07.002
dc.identifier.issn18088694
dc.identifier.urihttp://akademikarsiv.cbu.edu.tr:4000/handle/123456789/12374
dc.language.isoEnglish
dc.publisherElsevier Editora Ltda
dc.rightsAll Open Access; Gold Open Access
dc.subjectAdult
dc.subjectEar, Inner
dc.subjectEar, Middle
dc.subjectFacial Nerve
dc.subjectHumans
dc.subjectMastoid
dc.subjectTympanic Membrane
dc.subjectadult
dc.subjectanatomical concepts
dc.subjectArticle
dc.subjectcadaver
dc.subjectdecompression surgery
dc.subjectdissection
dc.subjectdura mater
dc.subjecteardrum
dc.subjectexternal auditory canal
dc.subjectfacial nerve
dc.subjectfemale
dc.subjecthuman
dc.subjecthuman tissue
dc.subjectincus
dc.subjectmale
dc.subjectmalleus
dc.subjectmastoid
dc.subjectmastoidectomy
dc.subjectsemicircular canal
dc.subjecttemporal bone
dc.subjecttranslabyrinthine approach
dc.subjectzygoma
dc.subjectinner ear
dc.subjectmastoid
dc.subjectmiddle ear
dc.subjectsurgery
dc.titleTransmastoid exposure of the labyrinthine segment of the facial nerve: an anatomical study
dc.typeArticle

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