Mallet Finger and Jersey Finger

Abstract

Mallet finger is the disruption of extension at the distal interphalangeal (DIP) joint secondary to an extensor tendon injury or bony avulsion of its insertion site on the distal phalanx. The patient will present with an inability to fully extend the distal phalanx. An X-ray should be obtained to assess for bony avulsions and volar subluxation. Conservative management with full-time splinting is most common. Surgical intervention is necessary if the bony avulsion involves >40% of the articular surface or volar subluxation is present.