Swan neck deformity

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Background

  • Delayed complication of chronic untreated mallet finger
  • Seen also in rheumatoid arthritis, trauma
  • Lateral bands displace proximally and dorsally = increased extension of PIP.
  • FDP unopposed

Clinical Features

  • PIP extension with DIP flexion

Differential Diagnosis

  • Joint volar subluxation
  • FDS laceration
  • Intrinsic contracture

Hand and finger injuries

Evaluation

  • Clinical diagnosis
  • Consider x-ray to rule out avulsion fracture

Management

  • Extension block splint
  • Refer to orthopedic surgery

Disposition

  • Discharge

See Also

External Links

References