Fig. 4

Vertebral Artery Hypoplasia: Pedicle screws for C1 and Laminar screws for C2. A patient with left vertebral artery dominant underwent laminar screw fixation due to Jefferson fracture. (A) image in PACS; (B) 3D reconstruction in 3D-Slicer; (C–E) postoperative imaging. (Arrow: right vertebral artery).