Baseball Finger (Mallet Finger)

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Also called a dropped finger, this injury results from hyperflexion to the distal interphalangeal joint. There is a dorsal avulsion fracture of the base of the distal phalanx. This indicates that the common extensor tendon remains attached to this avulsed fragment. The injury is typical at the second digit as the result of forced hyperflexion (catching a ball).
 - Click on the image for a larger versionAOblique radiograph of the second digit. This demonstrates an avulsion fracture of the dorsal aspect of the distal phalanx.

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