Magnetic resonance neurography in extraspinal sciatica

Aaron M. Lewis, Robert Layzer, J. W. Engstrom, Nicholas Barbaro, Cynthia T. Chin

Research output: Contribution to journalArticle

69 Citations (Scopus)

Abstract

Background: Sciatica without evidence of lumbosacral root compression is often attributed to piriformis syndrome. However, specific diagnostic tools have not been available to demonstrate sciatic nerve entrapment by the piriformis muscle. Objective: To evaluate the use of magnetic resonance (MR) neurography in identifying abnormalities of the sciatic nerve in patients with unexplained sciatica. Design: Case series from a retrospective medical record review. Patients: Fourteen patients with sciatic distribution pain and normal results on MR imaging for lumbosacral radiculopathy were referred for MR neurography of the lumbosacral plexus and sciatic nerves. Results: In 12 patients, MR neurography demonstrated increased fluid-attenuated inversion recovery signal in the ipsilateral sciatic nerve. In most patients, this abnormal signal was seen at the sciatic notch, at or just inferior to the level of the piriformis muscle. To date, 4 patients have undergone surgical decompression, with excellent relief of symptoms in 3 of them. Conclusion: Magnetic resonance neurography often identifies an abnormal increased signal in the proximal sciatic nerve in patients with extraspinal sciatica and allows more accurate diagnosis of sciatic nerve entrapment in suspected cases.

Original languageEnglish (US)
Pages (from-to)1469-1472
Number of pages4
JournalArchives of Neurology
Volume63
Issue number10
DOIs
StatePublished - 2006
Externally publishedYes

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Sciatica
Sciatic Nerve
Magnetic Resonance Spectroscopy
Nerve Compression Syndromes
Piriformis Muscle Syndrome
Lumbosacral Plexus
Surgical Decompression
Muscles
Radiculopathy
Normal Distribution
Medical Records
Nerve
Magnetic Resonance Imaging
Pain

ASJC Scopus subject areas

  • Neuroscience(all)

Cite this

Lewis, A. M., Layzer, R., Engstrom, J. W., Barbaro, N., & Chin, C. T. (2006). Magnetic resonance neurography in extraspinal sciatica. Archives of Neurology, 63(10), 1469-1472. https://doi.org/10.1001/archneur.63.10.1469

Magnetic resonance neurography in extraspinal sciatica. / Lewis, Aaron M.; Layzer, Robert; Engstrom, J. W.; Barbaro, Nicholas; Chin, Cynthia T.

In: Archives of Neurology, Vol. 63, No. 10, 2006, p. 1469-1472.

Research output: Contribution to journalArticle

Lewis, AM, Layzer, R, Engstrom, JW, Barbaro, N & Chin, CT 2006, 'Magnetic resonance neurography in extraspinal sciatica', Archives of Neurology, vol. 63, no. 10, pp. 1469-1472. https://doi.org/10.1001/archneur.63.10.1469
Lewis AM, Layzer R, Engstrom JW, Barbaro N, Chin CT. Magnetic resonance neurography in extraspinal sciatica. Archives of Neurology. 2006;63(10):1469-1472. https://doi.org/10.1001/archneur.63.10.1469
Lewis, Aaron M. ; Layzer, Robert ; Engstrom, J. W. ; Barbaro, Nicholas ; Chin, Cynthia T. / Magnetic resonance neurography in extraspinal sciatica. In: Archives of Neurology. 2006 ; Vol. 63, No. 10. pp. 1469-1472.
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