Iatrogenic pronator syndrome: case report

A case of congenital radio-ulnar synostosis with functional disability due to fixation of the forearm in maximal pronation was operated on with a rotational osteotomy in the proximal third of the forearm. Within four days postoperatively a total paralysis of the median nerve gradually developed. The median nerve was therefore explored and found to be strongly compressed by the stretched pronator teres and the superficialis bridge which were sectioned. Full motor and sensory recovery gradually occurred.