Radial Tunnel Syndrome

Radial Tunnel Syndrome is the name given to a set of symptoms caused by compression of the posterior interosseous nerve (PIN) - a branch of the radial nerve - as it travels through the lateral (outside) aspect of the elbow. Compression of the PIN may occur at several locations including the radial head, the arcade of Frohse (a fibrous arch through which the PIN travels) or between the two heads of the supinator muscle. Radial Tunnel Syndrome presents as pain in the lateral aspect of the forearm approximately 3-4cm below the elbow and is aggravated by increased elbow activity such as heavy lifting or by pronating (inwardly rotating) the forearm.


Radial Tunnel Syndrome may be confused with PIN Syndrome or Lateral Epicondylitis.

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