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KMID : 0860920190210010032
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Journal of the Korean Association EMG-Electrodiagnostic Medicine
2019 Volume.21 No. 1 p.32 ~ p.36
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Posterior Interosseous Neuropathy Caused by Torsion due to Leash of Henry: A Case Report
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Lee Hae-In
Kim Dahn
Kim Dong-Hwee
Park Jong-Woong
Kwon Hee-Kyu
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Abstract
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A 34-year-old man was referred for electrodiagnosis of left forearm and elbow pain with concurrent left wrist and finger extension weakness. Symptom developed abruptly, after waking up from sleep. After 11 days of onset, electromyography was performed. In nerve conduction study, the left radial motor response was unobtainable and in needle electromyography, abnormal spontaneous activities and no motor unit potential were noted in the left supinator, extensor digitorum communis, extensor carpi ulnaris and extensor indicis proprius muscles, suggesting left posterior interosseous neuropathy involving the supinator muscle and all the distal muscles to it. Subsequent ultrasonography of the left upper arm revealed multiple nerve torsions, and surgical exploration finally confirmed that the main torsion site was caused by the recurrent branch of radial artery, the Leash of Henry. We report an unusual case of spontaneous posterior interosseous nerve neuropathy due to nerve torsion caused by Leash of Henry.
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KEYWORD
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posterior interosseous nerve syndrome, electrodiagnosis, nerve compression syndromes
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