Petroclival tumor model--technical note and educational implications.

Area of Science:

• Neurosurgery
• Anatomical modeling
• Surgical simulation

Background:

• Petroclival lesions present significant surgical challenges due to their deep location and complex neurovascular relationships.
• Existing training methods may not fully replicate the distorted anatomy encountered during surgery for these rare tumors.

Purpose of the Study:

• To develop and validate a novel, adjustable petroclival tumor model for surgical practice.
• To assess the model's efficacy in simulating distorted anatomy and facilitating microsurgical training.

Main Methods:

• Utilized embalmed cadaver heads and an endoscopic endonasal transclival approach.
• Employed a balloon technique (one or two balloons) to create space for artificial tumor implantation.
• Injected a polymer to form artificial tumors of varying sizes (small: 9.41-10.36 ml, large: 21.05-23.99 ml).
• Performed tumor excision via retrosigmoid and anterior petrosal approaches.

Main Results:

• Successfully created six petroclival tumor models (three small, three large).
• The model accurately mimicked the distorted anatomy of real petroclival lesions during dissection.
• The models provided a realistic simulation for practicing microsurgical removal techniques.

Conclusions:

• A reproducible and adjustable petroclival tumor model has been established.
• This model serves as an effective training tool for microsurgical removal of petroclival lesions.
• The practice dissection using this model bridges the gap between normal anatomical dissection and actual surgical procedures.