A valuable non-invasive diagnostic investigation for paediatric idiopathic brachial neuritis.

[neuralgic amyotrophy]

Idiopathic brachial neuritis (idiopathic neuralgic amyotrophy ) in children is a well-recognized but rare condition . Although the precise aetiology is unknown , its usual occurrence after an infection suggests an immunological process . There is no specific test for brachial neuritis , and the diagnosis is one of exclusion with supportive evidence from nerve conduction studies , electromyography (EMG ), and , in adults , changes in affected muscles on magnetic resonance imaging . Young children are often unable to tolerate EMG .