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Forward displacement of one of the lower lumbar vertebrae over the vertebra below it or on the sacrum.

[New Latin spondylolisthēsis : Greek spondulos, vertebra + Greek olisthēsis, dislocation, slipping (from olisthanein, to slip).]
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Noun1.spondylolisthesis - a forward dislocation of one vertebra over the one beneath it producing pressure on spinal nerves
dislocation - a displacement of a part (especially a bone) from its normal position (as in the shoulder or the vertebral column)


n. espondilolistesis, desplazamiento anterior de una vértebra sobre otra, gen. la cuarta lumbar sobre la quinta o ésta sobre el sacro.
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The anomaly was reported as "L4 hypoplastic facet development with anterolisthesis of L4 on L5".
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 (Figure 8).

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