Certified Hand Therapist (CHT) Practice Exam

A Stener's lesion is associated with an injury of which ligament?

1. Flexor tendon

2. Ulnar collateral ligament (UCL) of the thumb

3. Radial collateral ligament of the wrist

4. Common extensor tendon

The correct answer is: Ulnar collateral ligament (UCL) of the thumb

A Stener's lesion specifically involves an injury to the ulnar collateral ligament (UCL) of the thumb, which is a crucial structure that helps stabilize the thumb during gripping and pinching motions. This type of injury typically occurs when there is an abrupt force applied to the thumb, such as during a fall or sports activities, which can lead to an avulsion of the UCL at its attachment site on the proximal phalanx. In cases of a Stener's lesion, the UCL is not only torn but may also become displaced, often underneath the adductor pollicis muscle, preventing proper healing and function. As a result, surgical intervention is usually required to realign and repair the ligament. Understanding Stener's lesions is crucial for those practicing in hand therapy and orthopedic fields, as timely and appropriate treatment can significantly impact the recovery of thumb function. The other options refer to different structures not involved in this specific lesion: flexor tendons, radial collateral ligament, and common extensor tendons are associated with various injuries and conditions, but they do not relate to the Stener's lesion pathology.