Scaphotrapeziotrapezoidal arthritis

Last revised by Ashesh Ishwarlal Ranchod on 31 Jul 2024

Scaphotrapeziotrapezoidal (STT) or triscaphe joint arthritis is common, occurring on ~9% (range 2-16%) of wrist radiographs 3,4. It is typically degenerative (i.e. osteoarthritis) affecting the triscaphe articulation and presents with radial-sided wrist or base of thumb pain in patients over 50 years 1,2,4. It can be associated with DISI alignment 3.

Cases and figures

  • Case 1
  • Case 2
  • Case 3: with distal radial fracture and 1st CMC arthritis
  • Case 4: isolated
  • Case 5: joint replacement and spacer
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