The radiological demonstration of dynamic ulnar impingement

The diagnosis of ulnar impingement is often missed because of a low index of clinical suspicion. Furthermore there has been no investigation that will demonstrate it. Most commonly impingement is seen as a complication of surgical procedures involving resection of all or part of the distal ulna, with or without resection or arthrodesis of the distal radioulnar joint. We demonstrate a simple radiological investigation that clearly confirms the diagnosis.