Stener lesion

Stener Lesion is a type of injury that occurs in the thumb. It is named after the Swedish surgeon, Dr. Bertil Stener, who first described the condition in 1962. This injury is characterized by the displacement of the ulnar collateral ligament (UCL) of the thumb's metacarpophalangeal joint (MCPJ) from its normal anatomic position to a position superficial to the adductor pollicis aponeurosis.

Causes

The Stener lesion is typically caused by a sudden forceful abduction of the thumb, often seen in sports injuries or falls. This forceful movement can cause the UCL to tear and displace, leading to the formation of a Stener lesion.

Symptoms

The main symptoms of a Stener lesion include pain, swelling, and instability of the thumb. The patient may also experience difficulty in gripping objects and decreased range of motion.

Diagnosis

Diagnosis of a Stener lesion is usually made through a combination of physical examination and imaging studies. The physical examination may reveal tenderness and instability of the thumb. Imaging studies such as X-rays, ultrasound, or MRI can help confirm the diagnosis.

Treatment

Treatment of a Stener lesion usually involves surgery to reposition and repair the displaced UCL. Following surgery, the thumb is usually immobilized for a period of time to allow for healing.

Prognosis

With appropriate treatment, most patients with a Stener lesion can expect a good prognosis and return to normal function.

See Also

• Ulnar collateral ligament
• Metacarpophalangeal joint
• Adductor pollicis muscle

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