What injury is associated with a "jersey finger"?

• A. Flexor digitorum profundus damage
• B. Extensor pollicis longus tear
• C. Fractured metacarpal
• D. Collateral ligament sprain

Answer: (A)

A "jersey finger" specifically refers to an injury to the flexor digitorum profundus tendon. This type of injury typically occurs when a person catches a jersey or other clothing while trying to grip something, causing the finger to be forcibly extended while the flexor tendon is still engaged. This results in a rupture or avulsion of the tendon from its insertion on the distal phalanx.

The mechanism of the injury involves a powerful force causing the finger to flex while the tendon is still under tension, leading to its disconnection. The clinical presentation often includes the inability to flex the affected finger at the distal interphalangeal joint, which is a hallmark sign of this tendon injury. Immediate recognition and surgical intervention are often necessary to restore function and prevent complications, such as tendon retraction and scarring.

Understanding this association is crucial in a surgical context, as timely diagnosis can significantly affect the resultant function of the affected finger after healing and rehabilitation.