L1 radiculopathy mimicking meralgia paresthetica: a case report
Seung Nam Yang1, Dong Hwee Kim
1Department of Physical Medicine & Rehabilitation, College of Medicine, Korea University, 516 Gojan-dong, Danwon-gu, Ansan City, Gyeonggi Province, 425-707 Seoul, Republic of Korea.
Muscle & Nerve
|January 19, 2010
Summary
Diagnosing L1 radiculopathy is challenging. Examining the quadratus lumborum muscle can aid in identifying this rare condition, even when other tests are normal.
Area of Science:
- Neurology
- Diagnostic Imaging
- Electromyography
Background:
- L1 radiculopathy is an uncommon neurological condition.
- Diagnosis is often complicated by non-specific symptoms and normal findings on standard electrodiagnostic tests.
Observation:
- A patient presented with left thigh pain and hypesthesia.
- Standard nerve conduction studies and needle electromyography were unremarkable.
- Abnormal spontaneous activity and motor unit potential changes were noted in the quadratus lumborum and iliopsoas muscles.
Findings:
- Magnetic resonance imaging revealed L1-2 disc extrusion with upward migration.
- Electromyography of the quadratus lumborum and iliopsoas muscles demonstrated abnormal spontaneous activity and reduced recruitment patterns.
Implications:
- This case highlights the diagnostic utility of examining the quadratus lumborum and iliopsoas muscles in suspected L1 radiculopathy.
- Inclusion of these muscles in electrodiagnostic assessments may improve the diagnosis of rare radicular syndromes.
- Further research into specific muscle involvement in L1 radiculopathy is warranted.
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