Figure 2

Degenerative Lumbar Spondylolisthesis (DLS). A lateral radiograph (A) and sagittal reconstructed CT image (B) of this 78 year old woman shows a 10 % anterolisthesis of L4 associated with severe facet joint osteoarthrosis (arrows). In this patient, severe osteoporosis has led to a fragility fracture of the L3 vertebral body. (Images courtesy of Lindsay J. Rowe, Newcastle, Australia).