الفهرس 
IntroductionOnly 14 pages are availabe for public view
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Abstract
Lumbosacral radiculopathy is a common problem, and many modalities as MRI and electrophysiological studies are used to evaluate patients with Lumbosacral radiculopathy2. Recently, MRN had been studied for the evaluation of patients with Lumbosacral radiculopathy and the results are promising2. So, our aim of this study was to evaluate the role of MRN in lumbosacral radiculopathy and correlate its results with history, clinical data, and electrophysiological findings. Our study included 30 cases with back pain radiating to lower limbs. It was done on cases at MR units of Diagnostic Radiology and Medical Imaging Department, Tanta university hospital and cases referred from The Neurosurgery department, from January 2021 to October 2022. The entire patients performed MRI and MRN of the lumbosacral spine. 21 cases performed electrophysiological studies within 3 months of the MRI and MRN. We correlated MRI, and MRN findings with clinical characteristics and electrophysiological findings. We also correlated between MRN findings and MRI findings. Then we calculated MRN sensitivity and specificity in comparison to EMG which is considered as a standard criterion. Our results showed that 20% of our cases had MRN root abnormalities (6 out of 30 cases). Nerve root compression and thickening was seen in all the six cases. Perineural edema was seen in 5 cases, and altered signal intensity was seen in 3 cases. Our results showed that there is no significant correlation between MRN root abnormalities and subjective clinical abnormalities. We also noted that 29.4% of cases with abnormal EMG (5 out of 17 cases) had abnormal MRN root abnormalities. MRN sensitivity is 29%, and specificity is 100% in comparison to EMG (taken as a standard). The above data means that there is no statistically significant correlation between MRN root abnormalities and EMG results (p-value=1).