Fig. (8.1-3) Comparison between conventional foraminoplasty and foraminoplastic superior vertebral approach (FSVNA). (1) conventional foraminoplasty, (2) foraminoplastic superior vertebral approach, Red circle: initial placement of working cannula, dotted area : resected area by foraminoplasty, (3) Guide rod and reamer insertion, radiologic view around the foramen before and after foraminoplasty