Korean J Otolaryngol-Head Neck Surg.  1998 Feb;41(2):174-178.

Surgical Anatomy for the Extended Middle Fossa Approach

Affiliations
  • 1Department of Otorhinolaryngology, College of Medicine, Yonsei University, Seoul, Korea. wsleemd@yumc.yonsei.ac.kr
  • 2Department of Anatomy, College of Medicine, Yonsei University, Seoul, Korea.

Abstract

BACKGROUND AND OBJECTIVES: The extended middle fossa approach is an essential method in approaching the internal acoustic canal and the cerebellopontine angle while preserving the hearing function. This work attempted to establish some anatomical landmarks in the petrous apex as it relates to the extended middle fossa approach.
MATERIALS AND METHODS
We dissected 49 human skulls of Korean origin by using the extended middle fossa approach.
RESULTS
Internal acoustic canal (IAC) was identified in an attempt to find reliable distances and angles to be used in the extended middle fossa approach. In addition, the dimensions of the fundus of IAC and IAC as well as the extension ranges were obtained.
CONCLUSION
The extended middle fossa approach is a good method in approaching the internal acoustic canal and cerebellopontine angle. In this study, we have established anatomical landmarks for using this approach in the human skulls of Korean origin.

Keyword

Surgical landmarks; Extended middle fossa approach

MeSH Terms

Acoustics
Cerebellopontine Angle
Hearing
Humans
Skull
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