Magnetic Resonance Imaging / Case Report / Humans / Male / Magnetic Resonance / Differential Diagnosis / Electromyography / Clinical Sciences / Adult / Public health systems and services research / Brachial Plexus / Upper Extremity / Magnetic resonance image / Differential Diagnosis / Electromyography / Clinical Sciences / Adult / Public health systems and services research / Brachial Plexus / Upper Extremity / Magnetic resonance image