User:Mr. Ibrahem/Ulnar collateral ligament injury of the thumb

Ulnar collateral ligament injury of the thumb, also known as skier's thumb, is an injury to the ulnar collateral ligament (UCL) of the thumb at the MCP joint. Symptoms may include instability, pain, swelling, and decreased grip strength. Complications may include Stener lesion, which can occurs in around half of complete tears.

It may occurs suddenly such as during a fall while holding a ski pole or due to repeated minor injuries. Other sports in which it commonly occurs include cycling, baseball, and football (soccer). The UCL may be stretched, completely torn, or pull of bone near the joint. Diagnosis may be supported by examination and medical imaging, with MRI being very accurate.

Some cases can be treated with a thumb spica splint or cast for 3 to 6 weeks. However, if the joint is unstable, there is a displaced fracture, or a Stener lesion is present, surgery is recommended. Physical therapy may than be required. Outcomes are generally good with appropriate management.

Ulnar collateral ligament injury of the thumb is relatively common. It is estimated to affect 200,000 people a year in the United States and makes up about 85% of injuries to the base of the thumb. Males are affected more often than females. Historically it was described in gamekeepers and Scottish fowl hunters, resulting from the method in which they broke the necks of animals. The first description was in 1955 by Campbell.