The patient is a 6-years-5-month-old boy, who complained of difficulty in elevating his right arm after practicing with a 3.5kg weighted drum when aged 6-years-3-month-old. Muscle weakness was evident in the deltoid and supraspinatus muscles. However, we found no limitation in nect range of motion. No remarkable results were seen in the following tests; Jackson test (-), Spuring test (-), Wright test (-), Eden test (-), Moley test (+), Three minute stress test (-). On EMG examination, results started to improve 5 months after his initial complaint. We concluded that brachial plexus injury in this case was caused by compression and/or overtraction of the brachial plexus by the heavy weight of the drum and the band.
