Skip to main page content
U.S. flag

An official website of the United States government

Dot gov

The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before sharing sensitive information, make sure you’re on a federal government site.

Https

The site is secure.
The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.

Access keys NCBI Homepage MyNCBI Homepage Main Content Main Navigation
Case Reports
. 2015 Apr;57(4):292-4.
doi: 10.3340/jkns.2015.57.4.292. Epub 2015 Apr 24.

Vestibular schwannoma atypically invading temporal bone

Soo Jeong Park  1 , Na-Rae Yang  1 , Eui Kyo Seo  1
Affiliations
Case Reports

Vestibular schwannoma atypically invading temporal bone

Soo Jeong Park et al. J Korean Neurosurg Soc. 2015 Apr.

Abstract

Vestibular schwannoma (VS) usually present the widening of internal auditory canal (IAC), and these bony changes are typically limited to IAC, not extend to temporal bone. Temporal bone invasion by VS is extremely rare. We report 51-year-old man who revealed temporal bone destruction beyond IAC by unilateral VS. The bony destruction extended anteriorly to the carotid canal and inferiorly to the jugular foramen. On histopathologic examination, the tumor showed typical benign schwannoma and did not show any unusual vascularity or malignant feature. Facial nerve was severely compressed and distorted by tumor, which unevenly eroded temporal bone in surgical field. Vestibular schwannoma with atypical invasion of temporal bone can be successfully treated with combined translabyrinthine and lateral suboccipiral approach without facial nerve dysfunction. Early detection and careful dissection of facial nerve with intraoperative monitoring should be considered during operation due to severe adhesion and distortion of facial nerve by tumor and eroded temporal bone.

Keywords: Temporal bone invasion; Vestibular schwannoma.

PubMed Disclaimer

Figures

Fig. 1
Fig. 1. A : Internal acoustic canal is eroded to disappear totally. B : Temporal bone destruction is extended to carotid canal. C : In superior part of petrous bone, there was pneumatized area with thick cortex of right side temporal area corresponded to destructed area by tumor. D : 3 dimensional CT angiography shows IAC, superior part of jugular foramen, and carotid canal is invaded and carotid artery (arrow) is exposed. IAC : internal auditory canal.
Fig. 2
Fig. 2. In MRI, mass is located in temporal bone and cerebellopontine angle (A), extended to tentorium (B) and jugular foramen (C). Tumor does not invade Merkel's cave and middle fossa (B and D).
Fig. 3
Fig. 3. Operative photography (A) shows severe adhesion between facial nerve and tumor mass. Pathological finding (B) reveals benign schwannoma and there is no abnormal vascularity or malignant feature.
See this image and copyright information in PMC

References

    1. Briggs RJ, Fabinyi G, Kaye AH. Current management of acoustic neuromas : review of surgical approaches and outcomes. J Clin Neurosci. 2000;7:521–526. - PubMed
    1. Feghali JG, Kantrowitz AB. Atypical invasion of the temporal bone in vestibular schwannoma. Skull Base Surg. 1995;5:33–36. - PMC - PubMed
    1. Lipkin AF, Coker NJ, Jenkins HA, Alford BR. Intracranial and intratemporal facial neuroma. Otolaryngol Head Neck Surg. 1987;96:71–79. - PubMed
    1. Lo WWM. Tumors of the temporal bone and cerebellopontine angle. In: Som PM, Bergeron RT, editors. Head and Neck Imaging. ed 2. St. Louis: Mosby; 1991. pp. 420–445.
    1. Takada Y, Ohno K, Hirakawa K. [Morphological and clinical study of acoustic tumor with respect to enlargement of internal auditory canal : mechanism of bone destruction] No Shinkei Geka. 1996;24:739–742. - PubMed

Publication types

LinkOut - more resources