Radial Tunnel Syndrome: Causes, Symptoms, and Treatment
Radial Tunnel Syndrome is a nerve compression condition caused by pressure on the radial nerve. It is often compared to carpal tunnel syndrome but is less commonly known. The radial nerve runs along the length of the arm, from the shoulder to the hand, passing through the radius (thumb-side of the forearm), which is why it is named after this area. The radial tunnel extends just below the elbow, where the nerve crosses over the bones of the forearm. When extra pressure is applied to this nerve, you may experience sharp pain in the forearm or back of the hand when trying to straighten your wrist and fingers.
What Causes Radial Tunnel Syndrome?
Radial tunnel syndrome is often caused by physical pressure on the radial nerve or repetitive strain on the related body part, similar to tennis elbow. Common causes include:
- Injury: Trauma or damage to the radial nerve.
- Tumors: Growths such as bone, fatty, or benign tumors can put pressure on the nerve.
- Ganglion cysts: Fluid-filled sacs that may compress the nerve.
- Swelling or fluid: Inflammation or swelling in the area can increase pressure.
- Poor flexibility: Tight muscles or tendons can restrict space for the nerve.
Signs and Symptoms of Radial Tunnel Syndrome
The main symptom of radial tunnel syndrome is pain in the arm or hand. Unlike other nerve compression syndromes, radial tunnel syndrome typically does not cause numbness or tingling because the radial nerve affects muscles, not sensory nerves. Symptoms may include:
- Sharp pain in the back of the hand
- Stabbing pain at the top of the forearm
- Muscle weakness
- Unusual muscle fatigue
These symptoms are usually felt or become more noticeable when trying to straighten your wrist and fingers.
Diagnosis of Radial Tunnel Syndrome at South Florida Hand and Orthopaedic Center
Our expert hand doctors can diagnose radial tunnel syndrome through a physical examination. The doctor will check for any mass pressing on the radial nerve, such as a lipoma, tumor, or cyst, and assess any injuries. If repetitive motion is the cause, it may be harder to pinpoint the exact source, but your pain’s location and type will guide the diagnosis.
Radial Tunnel Syndrome Treatment Options
Non-surgical treatments often involve:
- Nonsteroidal anti-inflammatory drugs (NSAIDs): To reduce pain and inflammation.
- Corticosteroid injections: To decrease swelling and relieve pressure.
- Splinting: To support the wrist and reduce strain on the radial nerve.
Physical therapy, including stretching, strengthening exercises, icing, heat therapy, and nerve-gliding exercises, may also be recommended. If conservative treatments do not work, surgery may be necessary. A radial tunnel release surgery involves making the tunnel larger to provide more space for the nerve, relieving pressure.
If you are experiencing symptoms of radial tunnel syndrome, contact the dedicated team at South Florida Hand and Orthopaedic Center. Our experts will review your condition and recommend the most suitable treatment plan for your needs.