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Contrast enhancement in spinal nerve roots: an experimental study
C Nguyen1, V M Haughton, K C Ho
1Department of Radiology, Medical College of Wisconsin, Milwaukee, USA.
AJNR. American Journal of Neuroradiology
|February 1, 1995
Summary
Contrast enhancement in spinal nerve roots indicates underlying nerve root degeneration and capillary endothelial damage. This study examined these histopathologic changes in compressed spinal nerves.
Area of Science:
- Neuroscience
- Pathology
- Radiology
Background:
- Contrast enhancement on magnetic resonance (MR) imaging can indicate pathology in spinal nerve roots.
- Understanding the histopathologic basis of contrast enhancement is crucial for diagnosing nerve root conditions.
Purpose of the Study:
- To histopathologically examine the endothelium of contrast-enhancing spinal nerve roots.
- To correlate imaging findings with microscopic changes in compressed spinal nerves.
Main Methods:
- Chronic compression of the S-1 spinal nerve root was induced in five adult baboons.
- Spinal nerves were imaged using MR at 8 and 16 days post-compression.
- Histopathologic and electron microscopic analyses were performed on the compressed nerve roots.
Main Results:
- All compressed spinal nerves exhibited contrast enhancement on MR imaging.
- Histopathologic examination revealed wallerian degeneration of the nerve root.
- Inflammation and disruption of the capillary endothelium within the spinal nerve were observed.
Conclusions:
- Contrast enhancement in lumbar spinal nerves is associated with degenerative changes.
- Damage to the capillary endothelium of spinal nerves correlates with contrast enhancement.