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[Posterior interosseous nerve palsy].

We report a case of radial palsy of the Frohse arcade type with complete motor deficit due to compression of the posterior interosseous nerve by a fibrous bands in the radial tunnel proximal to the arcade. Simple neurolysis of the posterior interosseous nerve with section of the compressing fibrous bands allowed complete recovery of the motor deficit. We discuss the surgical technique based on our experience with this case and earlier reports in the literature.