Retrolisthesis
Posterior displacement (but not dislocation) of a vertebra relative to the one below it
Retrolisthesis
A retrolisthesis is a posterior displacement of one vertebral body with respect to the subjacent vertebra to a degree less than a luxation (dislocation). Retrolistheses are most easily diagnosed on lateral x-ray views of the spine. Views where care has been taken to expose for a true lateral view without any rotation offer the best diagnostic quality. Retrolistheses are found most prominently in the cervical spine and lumbar region but can also be seen in the thoracic area.
Read on Wikipedia · Image James Heilman, MD, CC BY-SA 3.0
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