Fig. 5

Representative CT scans of a female patient who is a smoker in her 30s. A Preoperative coronal view showing loose S1 pedicle screws with halo around the screw track and no posterolateral fusion mass (Lenke D, definitely not solid with thin fusion masses bilaterally with obvious pseudarthrosis). B Two years postoperative showing posterolateral fusion mass (Lenke A, bilateral stout fusion masses present)