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Lumbar paraspinal muscle dennervation atrophy: Spectrum of MRI findings and etiologies. 2011

General Spine

GREGORY, E, PUNCH, MD
GREGORY, E, PUNCH, MD, Tripler AMC, Honolulu, Non ASSR Member
LYNNE, RUESS, MD, Nationwide Children's Hospital, Columbus, OH, Non ASSR Member
RICARDO, BURGOS, MD, Tripler AMC, Honolulu, Non ASSR Member
MICHELLE, YOSHIDA, MS, Non ASSR Member

Poster

Purpose

Purpose: To describe the spectrum of MRI findings of lumbar paraspinal muscle atrophy and correlate with clinical history and other MRI findings to identify and illustrate the various causes of dennervation atrophy.

Methods & Materials

Material and Methods: Nine patients with MRI findings of paraspinal muscle atrophy were identified. The clinical history provided by the patient at the time of MRI and patient demographics were recorded. MRI findings were tabulated and illustrative images chosen for presentation.

Results

Results: Seven males and 2 females had a mean age of 38 years (range 17-75). Five of 9 patients had bilateral lumbar paraspinal muscle atrophy although it was symmetric in only 1. The associated abnormalities and etiologies included severe facet joint degenerative arthropathy either unilateral or bilateral, disc disease with compression, post rhizotomy, post laminectomy, gout and neoplastic compression of lumbar nerve roots.

Conclusion

Conclusion: Recognition of the spectrum of MRI findings of lumbar paraspinous muscle atrophy will alert the radiologist to various clinical entities that may not have been previously recognized.

References/Financial Disclosures

References: 1. Barker K, Shamley D, Jackson D. Changes in the Cross-Sectional Area of Multiï¬