The pronator syndrome. (A case report and reappraisal)

A case of pronator syndrome is presented. Although this proximal entrapment of the median nerve occurs infrequently, it should be considered especially in the differential diagnosis of carpal tunnel syndrome. Since a combination of repeated pronation of the wrist and forceful flexion of the fingers may cause this syndrome, it is conjectured that certain activities (musicians, mechanics, baseball pitchers and tennis players) are predisposed to this entrapment neuropathy. The anatomical relationship, pathogenesis and treatment of the pronator teres entrapment are discussed.