Radial tunnel syndrome typically presents with which symptom?

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Radial tunnel syndrome is caused by compression of the radial nerve as it passes through the radial tunnel in the proximal forearm. The most characteristic finding is burning or aching pain along the lateral forearm, often with local tenderness about the radial tunnel just distal to the lateral epicondyle. Sensation is usually preserved and there isn’t a significant weakness of elbow extension, which helps separate it from a higher radial nerve injury. Numbness in the little finger would involve the ulnar nerve, not the radial tunnel, and pain at the medial elbow points to different nerve distributions or conditions. Inability to extend the elbow would indicate a lesion higher up on the radial nerve, not isolated radial tunnel compression. So the burning pain in the lateral forearm best matches radial tunnel syndrome.