CHORUS

Collaborative Hypertext of Radiology

Musculoskeletal system

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scaphoid (navicular) fracture

• rule of 70's
  • 70% of wrist fractures
  • 70% fracture at waist
  • 70% unite (5% --> AVN)

• most commonly fractured bone in wrist
  • only bone which bridges prox + distal carpal rows

• AVN occurs in PROXIMAL fragment: 1st sign is increased density

• perilunate fx-dislocation
• triquetral fx

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