Related Experiment Video
Updated: Aug 2, 2026
10:09
Transtubular Endoscopic Posterolateral Decompression for L5-S1 Lumbar Lateral Disc Herniation
Published on: October 14, 2022
Contrast-enhanced MR imaging performed after successful lumbar disk surgery: prospective study
S D Boden1, D O Davis, T S Dina
1Department of Orthopaedic Surgery, George Washington University Medical Center, Washington, DC 20037.
Radiology
|January 1, 1992
Summary
Gadolinium-enhanced MRI after lumbar disk surgery shows normal changes in facet joints and muscles. Residual nerve root enhancement and mass effect may mimic recurrent herniation, complicating early post-operative interpretation.
Area of Science:
- Radiology
- Neurosurgery
- Orthopedics
Background:
- Post-lumbar disk surgery imaging interpretation can be challenging.
- Understanding normal healing patterns is crucial for accurate diagnosis.
- Gadolinium-enhanced MRI is a key tool for evaluating spinal conditions.
Purpose of the Study:
- To define the typical temporal evolution of gadolinium-enhanced MRI findings post-successful lumbar disk surgery.
- To differentiate normal post-operative changes from recurrent or residual disk herniation.
Main Methods:
- Prospective study of 15 patients with symptom resolution after lumbar disk surgery.
- Serial gadolinium-enhanced MRI examinations were performed.
- Imaging findings were correlated with clinical outcomes.
Main Results:
- Facet joint and paraspinal muscle enhancement decreased over time.
- Nerve root enhancement resolved by 6 months post-operatively.
- Residual mass effect at the surgical site was common, potentially mimicking recurrent herniation.
Conclusions:
- Post-operative MRI findings in asymptomatic patients can simulate recurrent disk issues.
- A predictable pattern of imaging changes occurs in the first 6 months.
- These findings necessitate careful interpretation of early post-operative lumbar MRIs.
