Ver el código de «Mallet finger»

==Background==
[[File:PMC4807168 aps-43-134-g001.png|thumb|Possible mechanisms of injury from axial force applied to the tip of a straight digit (black arrows) causing: (top) DIP joint hyperextension (white upper arrow) and fracture, or (bottom) DIP hyperflexion (lower white arrow) and tendon lesion.]]
[[File:PMC4807168 aps-43-134-g004.png|thumb|Mallet finger injury types (Tubiana classification system).]]
*May be accompanied by avulsion fracture
*Caused by forced flexion of extended DIP joint
*If untreated, leads to [[swan neck deformity]]

==Clinical Features==
[[File:Mallet finger.jpg|thumb|Finger in maximum extension]]
*Rupture of extensor tendon in area of distal phalanx distal to DIP joint
*DIP joint flexed to 40°, unable to fully extend

==Differential Diagnosis==
{{Hand and finger injury DDX}}

==Evaluation==
[[File:Mallet finger.png|thumb|Mallet finger without fracture]]
[[File:MalletFinger.png|thumb|Mallet finger with fracture at the insertion of the extensor tendon]]
*Clinical diagnosis
*Consider finger x-ray (PA and lateral) to evaluate for avulsion fracture

==Management==
*Splint DIP joint in continuous slight hyperextension x 6 wk
*Splinting of the PIP joint is not necessary and should be avoided<ref>Katzman B et al. Immobilization of the mallet finger: effects of the extensor tendon. J Hand Surg Br. 1992; 24(1):80-84</ref>
**Inadvertently splinting PIP for 6 weeks results in collateral ligamentous overgrowth and functional disability<ref>Prosser R. Splinting in the management of proximal interphalangeal joint flexion contracture. J Hand Ther. 1996 Oct-Dec;9(4):378-86.</ref>
*Give an extra splint

[[File:Splint1.jpg|thumb|Special Mallet finger splint (if available)]]

==Disposition==
*Discharge with hand surgery follow-up in 7-10 days

==See Also==
*[[Hand and finger diagnoses]]

==References==
<references/>

[[Category:Orthopedics]]
[[Category:Sports Medicine]]