"My Hand Is Numb Again"—Don’t Ignore It: Early Diagnosis Is Key for Cubital Tunnel Syndrome [Kok! Health]

Recovery After Nerve Damage Is Difficult
Accurate Diagnosis Is Crucial in the Early Stages

Numbness in the hands is a common symptom but can have a variety of causes. Representative causes include carpal tunnel syndrome, cervical radiculopathy (commonly known as cervical disc disease), and cubital tunnel syndrome. One of these, cubital tunnel syndrome, occurs when the nerve at the elbow is compressed. In particular, if numbness in the little finger persists, it should not be dismissed as a simple blood circulation issue; an accurate diagnosis is necessary.

Google Gemini Generated Image.

Professor Kim Younghwan, an orthopedic surgeon at Soonchunhyang University Bucheon Hospital, explained, "Hand numbness can be seen in various conditions, but when a peripheral nerve is compressed, numbness appears characteristically in the area innervated by that nerve. Cubital tunnel syndrome is a condition caused by compression of the ulnar nerve as it passes through the inner side of the elbow."

On the inner side of the elbow, there is a narrow passage through which the ulnar nerve runs, called the cubital tunnel. When the nerve is compressed in this area, cubital tunnel syndrome can occur. The main symptoms are numbness in the little finger and the outer side of the ring finger. As the condition progresses, sensation may become dulled, or hand strength may decrease.

Professor Kim stated, "Patients often say, 'My hands feel numb,' 'I have no sensation,' or 'I keep dropping things.' Since the ulnar nerve controls the muscles responsible for the fine movements of the hand, any problem with it can affect hand function."

Idiopathic cases, where the cause is unclear, account for 30 to 50 percent of cubital tunnel syndrome cases. It is presumed that the nerve is directly compressed, or when the elbow is kept in a flexed position for prolonged periods, the pressure inside the cubital tunnel increases and nerve ischemia can occur. Other possible causes include deformities due to trauma, degenerative arthritis of the elbow joint, tumors in the cubital tunnel, or anatomical abnormalities.

Diagnosis involves using X-rays to check for abnormalities in bone structure, and electromyography and nerve conduction studies to evaluate nerve function. If necessary, ultrasound or MRI may also be performed. It is also important to distinguish cubital tunnel syndrome from polyneuropathy caused by conditions such as diabetes.

Treatment depends on the severity and duration of symptoms. In early cases where there is no atrophy of the hand muscles and symptoms are not severe, conservative treatment such as medication and wearing a brace to limit elbow flexion can be attempted. However, if symptoms persist for a long time or if there is muscle atrophy in the hand, surgery should be considered. The primary surgical procedure is decompression to relieve pressure on the ulnar nerve, and sometimes anterior transposition of the nerve or anterior interosseous nerve transposition may be performed in combination.

Professor Kim emphasized, "Once nerve tissue is damaged, recovery is not easy, so if treatment is delayed, full recovery may not be possible. If hand numbness lasts for more than two weeks, it is important to consult a specialist to determine the exact cause."

This content was produced with the assistance of AI translation services.