Thumb UCL Injury Thumb UCL (ulnar collateral ligament) injuries, sometimes called Skier's thumb or Gamekeepers thumb, occurs when the ligament is torn, typically from an acute injury during sports or falling on an...
Thumb UCL Injury Thumb UCL (ulnar collateral ligament) injuries, sometimes called Skier's thumb or Gamekeepers thumb, occurs when the ligament is torn, typically from an acute injury during sports or falling on an outstretched hand. The UCL is responsible for stabilizing the ulnar side of the thumb metacarpophalangeal joint. Diagnosis is made clinically and confirmed with radiographs, ultrasound and MRI.
Many patients can be managed non-surgically with immobilization however complete tears and stener lesions often require surgical intervention. When managed correctly, patients with UCL tears tend to have very good outcomes. Illustration of the normal UCL.
Illustration of the UCL tear with typically forced valgus/ abduction of the MCPJ UCL injuries marked by either avulsion or rupture of the ligament, affects the medial side of the thumb's metacarpophalangeal joint (MCPJ ). The term Gamekeepers thumb refers to "gamekeepers," whose repetitive motion of breaking rabbit necks led to a chronic, degenerative condition. Today, it is more commonly seen in skiers and athletes as an acute injury, where a sudden, radial-directed force causes hyperabduction of the thumb MCPJ.
This often occurs when a stock strap or similar force abducts the thumb during a fall or plant maneuver, causing exaggerated extension and abduction. The mechanism can also occur when falling on an outstretched hand with the thumb already in abduction, which receives additional valgus stress from the collision. Other sports aside from skiing include football, soccer, hockey and basketball.
Illustration of a Stener Lesion A Stener lesion occurs when the adductor pollicis muscle, which inserts on the base of the proximal phalanx alongside the ulnar collateral ligament (UCL), becomes interposed between the ruptured UCL and its proper healing site. The adductor pollicis has both superficial and deep attachments to the UCL, and this anatomical relationship can lead to complications if the ligament is fully ruptured. The muscle and adductor aponeurosis block the torn ligament from reattaching naturally, preventing proper healing.
If you are experiencing symptoms that may be related to ulnar collateral ligament of the thumb injury, it is important to see a sports medicine physician. Early evaluation and treatment typically lead to better outcomes. Do not ignore pain or symptoms that are limiting your activity.
*This article is for educational purposes only and does not substitute for professional medical advice. Always consult a qualified healthcare provider.*
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