1. Cystic changes within the endplates adjacent to the implants.
Cystic changes within the endplates adjacent to the implants. A, Five months after surgery in a 62-year-old woman, CT scan shows cystic changes (arrows) in the endplates at the L5–S1 level on an axial image. B, Twenty-one months after the application of posterior instrumentation, CT scan shows that the cystic changes are much less prominent as the fusion is progressing to solid bony union.
Alan L. Williams et al. AJNR Am J Neuroradiol 2005;26:
©2005 by American Society of Neuroradiology