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Brachial plexus injury by nonviolent means in an adolescent baton twirler.

Brachial plexus injuries are usually the result of violent trauma, or they may be chronic and recurrent with thoracic outlet syndrome. The case presented is an acute, nonrecurrent injury sustained by minor trauma. The injury to the brachial plexus occurred while a 15-year-old girl reached overhead to catch a baton. The treatment was conservative, and the patient made an almost complete recovery.