Scaphotrapeziotrapezoidal arthritis

Last revised by Dr Henry Knipe on 14 Sep 2022

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.

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Cases and figures

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