In a patient with degenerative changes of the distal radioulnar joint with marginal osteophytes and joint effusion, a high‑grade sprain of the ulnar attachment of the triangular fibrocartilage complex (TFCC), and a sprain of the scapholunate ligament, is ligament repair and distal radioulnar joint arthrodesis indicated?

Surgical Management of Combined DRUJ Degeneration, TFCC Tear, and Scapholunate Ligament Injury

TFCC repair is indicated for the high-grade ulnar-sided tear to restore distal radioulnar joint stability, but arthrodesis of the DRUJ should be avoided in favor of ligament reconstruction given the presence of degenerative changes with preserved joint function. 1, 2

Treatment Algorithm

Step 1: Address TFCC Pathology First

• High-grade ulnar-sided TFCC tears require surgical repair or reconstruction to restore DRUJ stability, as these tears are the primary stabilizers of the distal radioulnar joint 3, 1
• The ulnar attachment (foveal insertion) should be anatomically reattached using either transosseous sutures, suture anchors, or arthroscopic-assisted techniques 1, 2
• Arthroscopic or arthroscopic-assisted repair demonstrates improvement in pain, stability, range of motion, and disability in long-term retrospective studies 3

Step 2: Manage Scapholunate Ligament Injury

• Scapholunate ligament sprains require repair if there is evidence of instability (scapholunate diastasis >4 mm on PA radiographs) 4
• MRI demonstrates 92-100% sensitivity for detecting ligamentous injuries and their degree of involvement, which should guide surgical planning 5
• Wrist arthroscopy provides definitive diagnosis and allows concurrent treatment of both TFCC and scapholunate pathology 6

Step 3: Address DRUJ Degeneration Conservatively Initially

• DRUJ arthrodesis should NOT be the first-line treatment despite degenerative changes with osteophytes and effusion 2
• The presence of marginal osteophytes and joint effusion represents degenerative changes but does not automatically mandate arthrodesis 7
• Ligament reconstruction can restore DRUJ stability even in the presence of mild-to-moderate degenerative changes 2

Critical Decision Points

When to Consider Arthrodesis

• Arthrodesis is reserved for salvage situations where ligament reconstruction has failed or when there is severe, end-stage DRUJ arthritis with complete cartilage loss (not described in your case) 8
• The goal should always be preservation of pronosupination through anatomical ligament reconstruction rather than fusion 2

Surgical Sequence

• Perform combined arthroscopic evaluation and treatment addressing both TFCC and scapholunate pathology in a single procedure 1, 8
• TFCC repair/reconstruction should be prioritized as it is the crucial stabilizer guaranteeing unrestricted forearm rotation 2
• Concurrent scapholunate ligament repair can be performed arthroscopically or through limited open approaches 6

Common Pitfalls to Avoid

• Do not proceed to DRUJ arthrodesis based solely on imaging findings of degenerative changes - this eliminates forearm rotation and should only be considered after failed ligament reconstruction 2
• Do not treat these injuries as separate entities - they represent a spectrum of DRUJ instability that should be addressed comprehensively 8
• Do not rely on MRI alone for surgical planning - wrist arthroscopy provides superior diagnostic accuracy and allows immediate treatment 6, 5

Diagnostic Confirmation

• CT of both wrists in pronation, neutral, and supination is the modality of choice for evaluating DRUJ stability and should be obtained preoperatively 6
• MR arthrography increases diagnostic accuracy for foveal TFCC tears to nearly 100% sensitivity 5