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Metacarpophalageal Joint Dislocation S63.116A 834.01


ICD-9 Classification / Treatment
Etiology / Natural History Associated Injuries / DDx
Anatomy Complications
Clinical Evaluation Follow-up Care
Xray / Diagnositc Tests Review References



Metacarpophalageal Joint Dislocation ICD-10


A- initial encounter

D- subsequent encounter

S- sequela

Metacarpophalageal Joint Dislocation ICD-9

  • 834.01  closed dislocation Metacarpophalageal Joint
  • 834.11  open dislocation Metacarpophalageal Joint

Metacarpophalageal Joint Dislocation Etiology / Epidemiology / Natural History

  • Generally caused by a fall on the outstretched hand causing forcible hyperextension of the MCP joint. Volar dislocations may result from hyperflexion injury. 
  • Dorsal dislocations >> volar dislocations5
  • Index finger is most frequently involved, followed by the thumb.
  • The volar plate is avulsed from its metacarpal neck attachment during dorsal dislocation and may become interposed within the joint preventing reduction. Other structures may also prevent reduction: lumbrical muscle,  flexor tendons,  natatory ligament, superficial transverse metacarpal ligament.
  • Volar dislocations may be irreducible due to: dorsal capsule, distal insertion of the volar plate, collateral ligament,  tendinous juncture connecting the fourth and fifth extensor digitorum communis tendons, dorsal
    interosseous muscle, sesamoid bone.

Metacarpophalageal Joint Dislocation Anatomy

  • Proper collateral ligaments are the primary stabilizers of the MCP joint: taut in flexion, lax in extension.
  • Accessory collateral ligaments originate volar to the proper collateral ligaments and insert onto
    the volar plate;  taut in extension and lax in flexion.
  • Volar plate: thick fibrocartilaginous portion distally and a looser, membranous portion proximally.

Metacarpophalageal Joint Dislocation Clinical Evaluation


Metacarpophalageal Joint Dislocation Xray / Diagnositc Tests


Metacarpophalageal Joint Dislocation Classification / Treatment


Metacarpophalageal Joint Dislocation Associated Injuries / Differential Diagnosis


Metacarpophalageal Joint Dislocation Complications

Metacarpophalageal Joint Dislocation Follow-up Care


Metacarpophalageal Joint Dislocation Review References

  • Dinh P,  JAAOS; 2009 ; 17:318





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