[Preoperative Embolization for Cerebellopontine Angle Tumors]

Area of Science:

• Neurosurgery
• Interventional Radiology
• Vascular Neurology

Context:

• Skull base tumors are surgically challenging due to their deep location and limited operative field.
• Cerebellopontine angle tumors present complex vascular anatomy, including the petrosal branch of the middle dural artery and ascending pharyngeal artery.
• Tumor feeding vessels in this region are critical for vasa nervorum and can have dangerous anastomoses.

Purpose:

• To evaluate the safety and efficacy of preoperative embolization for skull base tumors.
• To describe a technique for safely occluding tumor-feeding vessels in the cerebellopontine angle.
• To minimize intraoperative complications associated with brain tumor resection.

Summary:

• Preoperative embolization reduces blood loss, softens tumors, and shortens resection time by occluding tumor nutrient vessels.
• The procedure involves guiding a microcatheter peripherally to inject a high-dilution Embosphere® (500-700µm).
• This technique is particularly beneficial for deep-seated skull base tumors, including those in the cerebellopontine angle.

Impact:

• Improved surgical outcomes for patients with skull base tumors.
• Reduced perioperative morbidity and mortality.
• Enhanced precision in neurosurgical interventions through targeted vascular occlusion.