Fig. 2

Surgery with the tumor tractor. a The tumor retractor was fixed to the tumor, and the retractor was pulled to the superior direction to secure the space. b After fixing and holding the tumor in place, the operator can perform the delicate dissection procedure. c If the tumor mass is removed, a wider surgical space can be secured, and it would be easier to perform the retraction in various directions. Surgery without the tumor retractor. b Surgical space is obtained with retraction of the surrounding brain tissue. d The operator can perform the delicate dissection procedure with brain retraction. f After the tumor was removed, a wider surgical space was secured