The anomaly was reported as "L4 hypoplastic facet development with anterolisthesis
of L4 on L5".
One had Lou Gehrig's disease and others had other spinal deformities such as anterolisthesis
, retrusion, and serious scoliosis.
Initial spinal radiography interpretation called attention to a grade 1 anterolisthesis
of L3 over L4 without a pars defect, as well as degenerative changes in the lower thoracic spine.
Type II: C2 fracture with displacement of the fragment anterior to the ring fracture with flexion, extension, or anterolisthesis
X-rays may demonstrate instability if forward shift (anterolisthesis
) is evident, or evidence of soft-tissue change or bony erosion from infection or tumour.