Guyon’s canal syndrome occurs when the ulnar nerve is compressed as it passes through a narrow space at the wrist known as Guyon’s canal. This nerve provides sensation to the little finger and part of the ring finger and is important for fine motor control and hand strength.
The condition can cause a combination of numbness, weakness and reduced coordination in the hand. It is often associated with prolonged pressure on the wrist, repetitive use or certain activities such as cycling.
Symptoms may develop gradually or follow a period of increased strain. Without appropriate treatment, this can lead to persistent weakness and loss of hand function.
Symptoms may develop gradually and can include:
Symptoms are often worse with prolonged pressure on the wrist.
Symptoms may develop gradually and can include:
Symptoms are often worse with prolonged pressure on the wrist.
Diagnosis is based on clinical assessment, including a detailed history and examination of sensation, strength and hand function.
If required, further investigations may include:
These tests help confirm the diagnosis and guide treatment
Treatment depends on the severity of symptoms and their impact on hand function.
Non-surgical treatment may include:
If symptoms persist or worsen, surgical decompression of the nerve may be recommended.
When non-surgical treatment is not effective, surgical decompression may be recommended.
The procedure involves releasing the structures forming Guyon’s canal to relieve pressure on the ulnar nerve. This allows the nerve to recover and improves hand function.
Surgery is typically performed as a day-case procedure under local or regional anaesthetic.
Following surgery, a light dressing is applied and early movement is encouraged.
Recovery typically involves:
Improvement in symptoms may take time, particularly where nerve compression has been present for longer.
As with any surgical procedure, there are potential risks, although these are uncommon.
Possible complications include:
Your surgeon will discuss the expected outcomes and risks before treatment.
You should seek medical advice if you experience persistent numbness, weakness or loss of coordination in the hand, particularly if symptoms are affecting daily activities.
Early assessment is important, as prolonged nerve compression can lead to permanent changes if left untreated.
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