| For example, the usual defects associated with a motion segment are either spondylolysis or spondylolisthesis with or without instability. |
| In an interview with the AP, Dean said he had known since he was in high school that he had an unfused vertebra, a condition called spondylolysis. |
| Dr. Dean went to an orthopedist, who diagnosed spondylolysis. |
| Adolescents with spondylolysis or spondylolisthesis experience an exacerbation of lumbosacral pain with spinal extension. |
| In our patient, the contralateral pedicular stress fracture first occurred in combination with unilateral spondylolysis. |
| Repair of defects in spondylolysis by segmental pedicular screw hook fixation. |
