Fig. 4From: Classification and microsurgical treatment of foramen magnum meningiomaThe process of microsurgery of the far lateral approach. a The inverted “L”-shaped skin incision (red line). b The inverted boot pattern bone window formed (blue line). c–d Preoperative and postoperative microscopic images. 1, accessory nerve; 2, vertebral artery; 3, C1 nerve; 4, tumor; 5, brainstem; 6, C2 nerve; 7, C3 nerve; 8, tumor bedBack to article page