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Updated: Oct 5, 2025
Role of Diffusion MRI Tractography in Endoscopic Endonasal Skull Base Surgery
Published on: July 5, 2021
Automated objective surgical planning for lateral skull base tumors
A E Rajesh1, J T Rubinstein2, M Ferreira3
1University of Washington School of Medicine, Seattle, WA, USA.
Purpose:
Surgical removal of pathology at the lateral skull base is challenging because of the proximity of critical anatomical structures which can lead to significant morbidity when damaged or traversed. Pre-operative computed surgical approach planning has the potential to aid in selection of the optimal approach to remove pathology and minimize complications.
Methods:
We propose an automated surgical approach planning algorithm to derive the optimal approach to vestibular schwannomas in the internal auditory canal for hearing preservation surgery. The algorithm selects between the middle cranial fossa and retrosigmoid approach by utilizing a unique segmentation of each patient's anatomy and a cost function to minimize potential surgical morbidity.
Results:
Patients who underwent hearing preservation surgery for vestibular schwannoma resection (n = 9) were included in the cohort. Middle cranial fossa surgery was performed in 5 patients, and retrosigmoid surgery was performed in 4. The algorithm favored the performed surgical approach in 6 of 9 patients.
Conclusion:
We developed a method for computing morbidity costs of surgical paths to objectively analyze surgical approaches at the lateral skull base. Computed pre-operative planning may assist in surgical decision making, trainee education, and improving clinical outcomes.
Insights
An automated planning algorithm helps select the best surgical approach for vestibular schwannomas, aiming to preserve hearing and minimize complications in lateral skull base surgery.
Area of Science:
- Neurosurgery
- Medical Imaging
- Computational Anatomy
Background:
- Lateral skull base surgery presents challenges due to critical anatomical structures.
- Pre-operative planning can optimize surgical approaches and reduce patient morbidity.
Purpose of the Study:
- To develop an automated surgical approach planning algorithm for vestibular schwannomas.
- To optimize hearing preservation in internal auditory canal surgeries.
- To minimize surgical morbidity through computed approach selection.
Main Methods:
- An algorithm was developed to select between middle cranial fossa and retrosigmoid approaches.
- Patient-specific anatomy was segmented.
- A cost function was used to minimize potential surgical morbidity.
Main Results:
- The study included 9 patients undergoing hearing preservation surgery for vestibular schwannoma.
- The algorithm's favored approach matched the performed surgery in 6 out of 9 cases.
- Middle cranial fossa approach was used in 5 patients, retrosigmoid in 4.
Conclusions:
- A method for computing surgical path morbidity costs was established.
- Computed pre-operative planning can aid surgical decision-making.
- This approach may improve clinical outcomes and aid in trainee education.
