A Case of Meningioma Resection with Endoscopic Sinus Surgery after Gamma Knife Irradiation

Abstract

Meningiomas account for 10-15% of all intracranial tumors, but less than 1-2% of them extend extracranially. They are benign tumors that originate in the meningothelial cells of the arachnoid granulations overlying the convexity of the brain and the skull base. We herein report on a case of meningioma that extended into the nasal cavity from the cavernous sinus, treated with surgical excision after Gamma-Knife irradiation. With the use of the Gamma-Knife procedure, the tumor was resected with less bleeding. In addition, Gamma-Knife irradiation increases the granulation that blocks the leakage of cerebrospinal if there are bone defects.