Figure 2:

Sequential intraoperative findings. (a) Tumor tightly adherent to the dorsal spinal cord. (b) Broad pial adhesion after internal decompression and distal root division; multiple pial feeders were coagulated and divided. Asterisk indicates the pia-denuded spinal cord surface. (c) Final view after gross-total resection, showing no intramedullary tumor extension. Asterisk indicates the pia-denuded spinal cord surface .The dotted lines in Figure 2c delineate the area of pial denudation. PSA: Posterior spinal artery.