Fig. 7.

A 36-year-old male construction worker sustained a left shoulder injury when a heavy object fell onto him. He presented with left upper limb pain and clinical signs of a left upper trunk brachial plexus injury. On MRI, coronal short tau inversion recovery sequence images show diffuse hyperintensity (arrows) of the (a) left C5 and C6 nerve roots, extending to the (b) trunks, divisions and cords. No disruption of the brachial plexus is evident. Given the presenting history, this is in keeping with a stinger injury of the left brachial plexus involving the C5 and C6 nerve roots.