DELAYED POSTERIOR INTEROSSEOUS NERVE PALSY

A rare case of delayed posterior interosseous nerve palsy that develop ed 39 years after an unreduced anterior dislocation of the radial head is reported. The posterior interosseous nerve was compressed and narr owed at the arcade of Frohse. Radial head resection and release of the arcade was done. The paralysis continued to recover 6 weeks after ope ration. The nerve, at the arcade of Frohse, was susceptible to compres sion by the dislocated radial head, especially in the supinated positi on, Repeated supination and pronation movement over time may have led to developmental changes that caused the delayed nerve palsy.