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J Korean Assoc EMG Electrodiagn Med 2013;15(1):47-52.
Published online June 1, 2013.
Non-traumatic Spontaneous Posterior Interosseous Nerve Palsy: Sonography and Magnetic Resonance Imaging with Electromyographic Correlation - A Case Report -
Received: 13 November 2012   • Revised: 2 May 2013   • Accepted: 2 May 2013
Abstract
Posterior interosseous nerve (PIN) syndrome is a rare compressive neuropathy of the forearm involving the deep radial nerve. Etiological origins of spontaneous PIN palsy are diverse and include entrapment neuropathy, space-occupying lesions, inflammatory change, neuralgic amyotrophy, mononeuritis and fascicular constriction. We present a case of non-traumatic spontaneous PIN syndrome with sonographic imaging, magnetic resonance (MR) imaging findings and electrodiagnostic correlations. This is the first to comprehensively report on the sonographic and MR imaging findings of a spontaneous case of PIN syndrome.
Key Words: Radial neuropathy, Posterior interosseous nerve
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