What is a characteristic symptom of radial tunnel syndrome?

• A. Motor loss pattern
• B. Pain over lateral aspect of elbow/forearm
• C. Prolonged wrist flexion pain
• D. Distal forearm swelling

Answer: (B)

Radial tunnel syndrome is characterized primarily by pain located over the lateral aspect of the elbow and forearm, which is exactly why this symptom is considered a hallmark of the condition. This pain results from the compression of the radial nerve as it traverses the radial tunnel near the elbow, leading to a sensation that is often described as aching or burning. This pain typically worsens with activities involving wrist extension or forearm pronation, further isolating it as a key indicator of radial tunnel syndrome.

In contrast, a motor loss pattern is more indicative of conditions that involve significant neurological compromise, such as radial nerve palsy, where motor deficits are more pronounced. Prolonged wrist flexion pain can suggest issues related to tendinitis or other soft tissue injuries rather than radial tunnel syndrome specifically. Distal forearm swelling does not align with the typical presentation of radial tunnel syndrome, as the condition primarily involves pain without notable swelling unless there is an associated inflammatory process. Therefore, the lateral elbow and forearm pain remains the defining characteristic of radial tunnel syndrome.