Figure 2: Pencil drawing illustrations. (a): Skin incision (dotted green line), craniotomy (brown line), and dura mater opening (blue line). (b): Right-sided approach because of the absence of bringing vein, and resection of the right side of the meningioma. (c): Inclination of the microscope and tilt of the operative table, which allows transfalcine approach for the resection of the left side of the tumor