Swan neck deformity

hand bones

Bones of the hand

(Click on  image for an enlarged view)

Swan neck deformity refers to a structural deformity of the hand in which

  • proximal interphalangeal joints are in hyperextension
  • distal interphalangeal joints are in hyperflexion
  • Commonly seen in injuries or inflammatory conditions like rheumatoid arthritis
  • Seen in 50% of patients with rheumatoid arthritis
  • Treatment is by surgical correction

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Undisplaced fracture

Fracture of a bone in which the fracture fragments do not separate