Scapholunate advanced collapse (SLAC)

Discussion:

SLAC (scapholunate advanced collapse) refers to a specific pattern of degenerative arthritis and subluxation which results from untreated chronic scapholunate dissociation.

Watson staging is often used by hand surgeons: 

  • I: osteoarthritis of the articulation between the radial styloid and the scaphoid
  • II: osteoarthritis involving the whole radioscaphoid articulation
  • III: osteoarthritis of the radioscaphoid and capitolunate articulations
  • IV: osteoarthritis of the radiocarpal and intercarpal articulations +/- distal radioulnar joint (DRUJ)

In this case, it is a stage III SLAC wrist.

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