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Endoscopic Transorbital Extended Middle Fossa Approach: A Potential Addition to the Lateral Skull Base Surgical
Juan C Yanez-Siller1, Raywat Noiphithak2, Kris S Moe3,4
1Department of Otolaryngology-Head and Neck Surgery, Northwestern Memorial Hospital, McGaw Medical Center of Northwestern University, Feinberg School of Medicine, Chicago , Illinois , USA.
The endoscopic transorbital extended middle cranial fossa approach (ETEMF) provides feasible access to the temporal bone (TB) at the lateral skull base. This novel technique allows exposure of key anatomical structures within the TB for potential surgical applications.
Area of Science:
- Neurosurgery
- Anatomy
- Surgical Innovation
Background:
- Lateral skull base pathologies require diverse treatment strategies.
- The endoscopic transorbital approach is emerging for cranial base surgeries.
- Anatomical details of the temporal bone via this approach remain undescribed.
Purpose of the Study:
- To introduce and evaluate the feasibility of the endoscopic transorbital extended middle cranial fossa approach (ETEMF).
- To assess ETEMF's utility for accessing temporal bone structures at the lateral skull base.
Main Methods:
- The ETEMF procedure was performed on 7 cadaveric heads (14 sides).
- Key anatomical landmarks and structures of the temporal bone were unroofed and exposed.
- Detailed anatomical examination relevant to the ETEMF was conducted.
Main Results:
- Major structures of the temporal bone, including the facial nerve and semicircular canals, were successfully exposed.
- Landmarks such as the crista ovale and foramen ovale were identified.
- The approach required minimal retraction of orbital structures and dura.
Conclusions:
- The ETEMF approach is a feasible method for exposing temporal bone anatomy at the lateral skull base.
- This novel approach provides access to critical structures within the temporal bone.
- Further research is needed to establish the role of ETEMF in surgical practice.
