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3 results

  • Utility of Sensory Nerve Conduction Study in Radiologically Positive Lumbosacral Plexopathy

  • Yew Long Lo, Yam Eng Tan, Ruby Hwang, Peggy Pei Chee Teng
  • Journal:
    Canadian Journal of Neurological Sciences / Volume 51 / Issue 1 / January 2024
    Published online by Cambridge University Press:
    01 March 2023, pp. 134-136
    • Article
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  • MRI is the most appropriate imaging method for visual evaluation of lumbosacral plexopathy (LSP) and a reference for comparing with nerve conduction study (NCS). Eight patients with clinical, electrophysiological, and lumbosacral plexus MRI findings suggestive of LSP were prospectively recruited. Saphenous nerve abnormalities were present in seven patients (88%), compared to three for the superficial fibular (38%), and three for the sural nerve (38%). MRI showed tumor, hematoma, abscess, contrast enhancement, or hyperintense signals on the T2-weighted sequences. The SN has the highest yield in MRI positive LSP and may be a vital adjunct for electrophysiological evaluation of LSP.

  • Chapter 20 - Opioids

  • from Section 6 - The Management of Neuropathic Pain
  • Edited by Cory Toth, Dwight E. Moulin
  • Book:
    Neuropathic Pain
    Published online:
    05 December 2013
    Print publication:
    07 November 2013, pp 240-248

  • Summary

    Nerve root compression can occur from osteophyte formation, disc herniation, or a combination. As only 1-2% of patients with back pain have a nerve root or spinal cord compression, an accurate diagnosis of the causes of painful radiculopathy relies on a thorough history and physical exam. It is important to note that many asymptomatic individuals have abnormalities such as disc herniations and foraminal stenosis on CT and MRI. Therefore, the imaging findings must be correlated with the history and examination findings. Surgery for spinal stenosis and neurogenic claudication is indicated if severe pain is present, and can provide sustained relief. Since the spinal cord terminates at the L1-2 vertebral level, lumbar pathology below this level may compress the distal nerve root, causing a cauda equina syndrome. A lesion affecting the lumbosacral plexus (LSP) can present with pain in the low back, hip or pelvis, or with sciatica pain.