Brachial plexus injury following risser hyperextension casting for scheuermann's disease.

The occurrence of two cases of brachial plexus as a complication of Risser hyperextension cast is reported. The symptoms started just after application of the cast, and both cases had complete resolution of the problem a few months after thecast was removed. The paper should bring attention to the lesion and should emphasize the necessity of removing the cast when the diagnosis is made, regardless of whether or not there is local pressure.