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AAEM case report #24: electrodiagnosis in posttraumatic syringomyelia
1Department of Rehabilitation Medicine, University of Washington School of Medicine, Seattle.
Muscle & Nerve
|July 1, 1992
Summary
This study highlights how electrophysiologic methods can diagnose and monitor posttraumatic syringomyelia. Shunting a syrinx improved nerve conduction and motor evoked potentials in a quadriplegia patient.
Area of Science:
- Neurology
- Neurosurgery
- Spinal Cord Injury Research
Background:
- Posttraumatic syringomyelia is a complex complication following spinal cord injury.
- Cervical syrinx formation can lead to significant neurological deficits and pain.
Observation:
- A patient with C-7 quadriplegia and neck pain presented with prolonged F-wave latencies and a C-1 syrinx on MRI.
- Following surgical shunting, F-wave latencies normalized, indicating improved nerve conduction.
Findings:
- Despite initial improvement, persistent rostral syrinx correlated with prolonged motor evoked potential (MEP) latencies.
- Resolution of syrinx distension led to normalized MEPs and improved motor strength.
Implications:
- Electrophysiologic monitoring, including F-wave and MEP latency assessment, is crucial for managing posttraumatic syringomyelia.
- Serial MRI and electrophysiologic studies aid in understanding syrinx evolution and guiding treatment.
- This case underscores the utility of electrophysiology in assessing neurological recovery after spinal cord injury interventions.