[About the problem of radial tunnel syndrome or "where does the tennis elbow end and where does the radial tunnel syndrome begin?"].

Tennis elbow or epicondylitis lateralis humeri is a commonly seen pain-syndrome. Radial tunnel syndrome is generally assumed to be a rare nerve compression syndrome. This study intents to demonstrate that tennis elbow is the most common manifestation of radial tunnel syndrome or in other words, tennis elbow is nothing else but radial tunnel syndrome. In patients with tennis elbow one will always find the ramus profundus n. radialis compressed by the arcade of Frohse. The author is convinced that following the carpal tunnel syndrome, the radial tunnel syndrome is the second most common nerve compression in upper extremity.