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Upon visual inspection, you observe an athlete's finger is in extension of the MCP and DIP and flexion of the PIP. Which injury has occurred?

Option 1: Mallet Finger
Option 2: Boutonniere Deformity
Option 3: Jersey Finger
Option 4: Swan Neck Deformity

Answer :

Final answer:

The condition described is a Swan Neck Deformity, characterized by hyperextension of the PIP joint and flexion of the DIP joint. This is distinct from Mallet Finger, Boutonniere Deformity, and Jersey Finger.

Explanation:

The condition you're describing, where there is extension of metacarpophalangeal (MCP) and distal interphalangeal (DIP) joints, and flexion of the proximal interphalangeal (PIP) joints, is consistent with a Swan Neck Deformity. This is characterized by hyperextension of the PIP joint and flexion of the DIP joint. In contrast, a Mallet Finger injury involves flexion of the DIP joint, a Boutonniere Deformity involves extension of the DIP and flexion of the PIP, and a Jersey Finger involves avulsion of the flexor digitorum profundus from the distal phalanx, leading to inability to flex the DIP joint.

Learn more about Swan Neck Deformity here:

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