[The supinator syndrome. An anatomic and clinical study].

The posterior interosseous syndrome appears in two forms, a) paralytical, and b) painful. In this investigation the authors report on twelve operated patients with painful posterior interosseous or "radial tunnel" syndrome. The intraoperative findings in the arcade of Frohse are compared with the findings on preparation of ten recently deceased. It was especially significant that in ten of twelve cases there was found intraoperatively a tendinous type of arcade. In the cadaveric studies the authors encountered this type of tendinous arcade in only two of ten specimens. Based on these findings, the authors conclude that the tendinous arcade of Frohse is an important factor in the development of the posterior interosseous syndrome.