How is an ulnar impaction syndrome etiology of wrist pain diagnosed and treated?

Updated: Apr 26, 2021
  • Author: David M Lichtman, MD; Chief Editor: Harris Gellman, MD  more...
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As previously noted, swelling and tenderness localized to the TFCC and lunotriquetral joint suggests ulnar impaction syndrome. [17, 18, 21, 22, 24] Ulnar impaction can progress from TFCC wear to frank tears, triquetral chondromalacia, and lunotriquetral instability. Radiographs show an ulnar positive variant and, often, cysts in the triquetrum and ulnar one half of the proximal lunate. MRI can be helpful in the diagnosis by revealing signal changes and edema in the ulnar head, triquetrum, and lunate. The treatment is ulnar shortening [48, 49] or a wafer procedure. [50]

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