Microsurgery For Large And Giant Petroclival Meningioma

Objective:To investigate the extent of tumor resection.to summarize the experience of microsurgical removal of the large and giant petroclival meningioma. Method:We retrospectively reviewed the medical records of 26 patients treated surgical for a large or giant petroclival meningioma.Tumor maximum diameter>2.5cm.Lesions subject are located in the petroclival area.7 cases were conducted with subtemporal transpetrosal,15 with retrosigmoid approach,2 with Supra-infratentorial approach(subtemporal and retrosigmoid sinus combined approach),2 wih orbitozygomatic approach.Result:Of all patients in this group, gross total resection(Simpson GradeⅠorⅡ)was achieved in 13 patients,subtotal resection(GradeⅢ)was achieved in 4 patients,partial resection(Simpson GradeⅣ) was achieved in 9 patients. Conclusion:To avoid blind pursuing gross total resection of tumors,and to find the balance between the extent of tumor resection and reducing postoperative complications.Different surgical approaches should be chosen according to different kinds of large and giant petroclival meningioma,according to the size, growth pattern and encroachment area,etc.