Surgery of tumors invading the cavernous sinus

Area of Science:

• Neurosurgery
• Oncology
• Skull Base Surgery

Background:

• Cranial base tumors often involve the cavernous sinus, posing challenges for complete surgical resection due to proximity to critical neurovascular structures.
• Direct surgical intervention within the cavernous sinus is sometimes required for tumor removal, necessitating specialized techniques to minimize morbidity.

Observation:

• This report details a refined surgical technique for direct cavernous sinus surgery based on 18 cases of histologically benign tumors.
• Tumor extension dictated entry via the superior or lateral walls of the cavernous sinus.
• The operative microscope was crucial for precise dissection and preservation of the internal carotid artery and cranial nerves within the sinus.

Findings:

• The refined technique allowed for dissection and preservation of neurovascular structures in the cavernous sinus.
• Venous bleeding was effectively managed through packing.
• One patient experienced hemiplegia, and four developed cranial nerve palsies as complications related to the cavernous sinus surgery.

Implications:

• Direct cavernous sinus surgery, when refined with advanced techniques and operative microscopy, offers a viable approach for managing complex cranial base tumors.
• Careful surgical planning and execution are essential to mitigate the risks of neurovascular injury and postoperative complications.
• Further research into optimizing surgical strategies for cavernous sinus tumors could improve patient outcomes.