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C-arm-Free Simultaneous OLIF51 and Percutaneous Pedicle Screw Fixation in a Single Lateral Position

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Spondylolisthesis and posterior instability.

P Niggemann¹, P Simons, J Kuchta

¹Privatpraxis für Upright MRT, Köln, Germany. p.niggemann@mrt-koeln.de

Acta Radiologica (Stockholm, Sweden : 1987)

|March 3, 2009

Summary

This summary is machine-generated.

This study reveals posterior instability in spondylolisthesis patients using upright MRI. This instability, potentially common, involves the L5 nerve root and may be diagnosed with specialized imaging.

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Area of Science:

Spine surgery
Radiology
Orthopedics

Background:

Spondylolisthesis, a condition where one vertebra slips over another, is often caused by spondylolysis.
Traditional imaging may not reveal all forms of instability associated with this condition.

Observation:

A patient with L5-S1 spondylolisthesis due to L5 spondylolysis was evaluated.
Functional upright MRI demonstrated posterior instability at the L5 level.

Findings:

A hypertrophic ligamentum flavum was displaced, contacting the L5 nerve root during spinal extension.
This is the first reported case of posterior instability in spondylolisthesis, diagnosed via upright MRI.

Implications:

Posterior instability in spondylolisthesis may be more common than previously thought.
Upright functional MRI appears crucial for diagnosing this specific type of instability.
The clinical significance of this posterior instability requires further investigation.