[Supinator syndrome. Entrapment of the posterior interosseous nerve].

Activity related pain on the lateral side of the elbow or proximal on the forearm may be caused by compression of the posterior interosseous nerve in the radial tunnel. A number of different specialties can be involved in this patient. Often there is no effect of conservative treatment. Several investigations show that the condition can be treated surgically with good to excellent results in the majority of patients. Often the patients suffer a number of concomitant overuse syndromes. The clinical characteristics and the surgical approach to the problem is described and illustrated by two case stories.