In late September 2000, a nine-year-old boy with no significant past medical history complained of pain over the upper third of his left arm, associated with a fever of 38.2°C. His pain was associated with numbness and progressed over the subsequent three days, radiating to the left wrist, left shoulder and lateral aspect of his neck. The pain was worse on palpation, with active movement and at night, causing insomnia. Four days after the onset of symptoms, the patient developed uncontrolled tremors of his left arm, increasing with voluntary movements and stress. The next day, the child presented for medical assessment and was hospitalized.