Intraparenchymal Meningioma in the Basal Ganglia

We herein report a rare case of intraparenchymal meningioma in the right basal ganglia. The tumor was located incidentally and preoperatively diagnosed as malignant glioma. Preoperative magnetic resonance imaging revealed that the tumor involved the lenticulostriate artery, and open biopsy was performed to avoid postoperative neurologic deficits. Pathologic diagnosis was fibrous meningioma, and the patient was treated with stereotactic radiation therapy using intensity-modulated radiation therapy. The case illustrates that preoperative evaluation of tumors in the basal ganglia is challenging and that intraparenchymal meningioma should be included in the differential diagnosis of basal ganglia tumors.