A patient presents with wrist pain after a fall, with pain on supination and pronation, no focal point tenderness, and ulnar‑sided wrist pain—what is the appropriate initial evaluation and management?

Initial Evaluation and Management of Ulnar-Sided Wrist Pain After Fall

Obtain a 3-view wrist radiograph series immediately (posteroanterior, lateral, and 45° semipronated oblique), and if negative or equivocal with persistent clinical suspicion, proceed directly to either MRI without contrast, CT without contrast, or repeat radiographs in 10-14 days with immobilization. 1

Initial Imaging Approach

The ACR Appropriateness Criteria (2019) establishes radiography as the mandatory first-line imaging for all acute wrist trauma 1. However, two views are insufficient—you need at least three views to avoid missing occult fractures 1. For your patient with ulnar-sided pain and pain on rotation, consider adding a fourth semisupinated oblique view, which increases diagnostic yield for distal radius fractures 1.

Key Clinical Context

Your patient's presentation—pain with supination/pronation, no focal point tenderness, and ulnar-sided localization—raises concern for several diagnoses:

• Distal radioulnar joint (DRUJ) injury or dislocation (pain with rotation is classic)
• Triangular fibrocartilage complex (TFCC) tear (ulnar-sided pain, rotational symptoms)
• Lunotriquetral ligament injury (ulnar-sided pain after trauma)
• Occult distal radius or ulnar styloid fracture (up to 30% can be radiographically occult initially) 2

The absence of point tenderness does not rule out fracture—physical findings have variable predictive value, with pain on active/passive motion being more sensitive (97.1%/94.3%) than localized tenderness alone 3.

If Initial Radiographs Are Negative or Equivocal

You have three equivalent options per ACR guidelines 1:

1. MRI without IV contrast (preferred if ligamentous injury suspected)

   • Detects occult fractures of distal radius and carpal bones
   • Uniquely identifies concomitant ligament injuries including TFCC and scapholunate ligament tears that CT cannot visualize 1
   • Changes diagnosis in 55% and management in 66% of patients with unexplained symptoms 1
   • Radiocarpal arthrogram has 90%/98% sensitivity/specificity for TFCC tears 4

2. CT without IV contrast

   • Excellent for detecting occult fractures
   • Superior for visualizing intra-articular extension and preoperative planning 1
   • Cannot evaluate ligamentous injuries 1—this is a critical limitation for ulnar-sided pain with rotational symptoms

3. Immobilize in short arm cast and repeat radiographs in 10-14 days 1

   • Major downside: delays diagnosis and may lead to functional impairment 1
   • Only reasonable if advanced imaging unavailable

Recommended Algorithm for Your Patient

Given the specific presentation (ulnar-sided pain + rotational pain + no point tenderness):

Step 1: Obtain 3-view wrist radiographs (PA, lateral, 45° semipronated oblique) 1

Step 2: If radiographs show DRUJ or carpal malalignment without fracture → proceed to CT of both wrists without contrast, MRI without contrast, or MR arthrography (all equivalent per guidelines) 1

Step 3: If radiographs are completely negative but clinical suspicion remains high → choose MRI without contrast over CT because:

• Pain with supination/pronation strongly suggests DRUJ or TFCC pathology 5, 4
• MRI detects both occult fractures AND soft tissue injuries 1
• CT will miss ligamentous injuries that are likely driving symptoms 1

Step 4: If MRI unavailable and you must choose between CT or delayed repeat radiographs → choose CT to avoid the functional impairment from delayed diagnosis 1

Critical Pitfalls to Avoid

• Don't rely on absence of point tenderness to rule out fracture—sensitivity is only 94.3% 3
• Don't order only 2 views—this misses fractures in wrist injuries 1
• Don't assume normal initial radiographs exclude significant injury—up to 30% of carpal fractures are radiographically occult 2
• Don't order CT with IV contrast—there is no evidence supporting its use in acute wrist trauma 1
• Don't delay imaging if advanced modalities are available—the 10-14 day wait-and-repeat approach causes functional impairment 1

Immediate Management Pending Imaging

While awaiting definitive imaging, immobilize the wrist in a short arm splint for comfort and to prevent displacement of any occult fracture. The mechanism (fall) combined with rotational pain warrants treating this as a potentially unstable injury until proven otherwise.