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Physical tests for Radial Tunnel Syndrome. A and B: Different sites of pain in RTS and lateral epicondylitis. Tenderness in lateral epicondylitis is directly on the lateral epicondyle while in RTS the tenderness is 5 cm distal to the epicondyle. C: Increased pain in the proximal radial forearm and over the radial tunnel, on hyperextension of the wrist against resistance. D: Pain during resisted extension of the middle finger is a valuable test in diagnosis of RTS.
