Teachable Moment: Electrodiagnostic Findings of True Neurogenic Thoracic Outlet Syndrome-EDX Findings True Neurogenic TOS Final

Video Transcription

Video Summary

In this video, Dr. Wang discusses the electrodiagnostic findings of True Neurogenic Thoracic Outlet Syndrome (TOS), a rare condition with an estimated prevalence of one in one million. TOS occurs when the lower trunk of the brachial plexus is compressed by a fibrous band connecting a cervical rib to the first thoracic rib. Patients typically experience sensory abnormalities like paresthesias and numbness in a T1 or C8 distribution, along with grip weakness. Physical exam findings may include focal atrophy of the thanar eminence and weakness in the long finger flexors. Electrodiagnostic studies can detect low amplitude in the median and ulnar innervated muscles, among other abnormalities. Diagnostic imaging like MRI and CT angiogram can further confirm the diagnosis.

Keywords

True Neurogenic Thoracic Outlet Syndrome

prevalence

brachial plexus compression

sensory abnormalities

grip weakness