Treatment for Scaphoid Contusion
For a true scaphoid contusion (bone bruise without fracture), treat with a supportive bandage or soft wrap for 3 days with early mobilization, rather than cast immobilization.
Clinical Context and Diagnostic Approach
The critical first step is distinguishing a true contusion from an occult fracture, as this fundamentally changes management. When you have clinical suspicion for scaphoid injury (snuffbox tenderness, pain with axial thumb loading) but normal initial radiographs, you must assume fracture until proven otherwise 1.
Imaging Algorithm
- Initial radiographs negative but clinical suspicion present: Obtain MRI within 3-5 days, or alternatively CT 2
- MRI is superior for detecting occult fractures and can change diagnosis in 55% of cases and management in 66% of patients with unexplained symptoms 3
- Do not rely on ultrasound (only 47% sensitivity, 61% specificity for scaphoid fractures) 3
Treatment Based on Diagnosis
If True Contusion (No Fracture on Advanced Imaging)
Supportive bandage for 3 days with early mobilization is appropriate 4. The SUSPECT study protocol demonstrates that most patients with clinically suspected scaphoid fractures and normal radiographs (>90%) do not have fractures and are overtreated with casting 4.
If Occult Fracture Detected
Treatment depends on fracture characteristics:
Non-displaced or minimally displaced (≤0.5 mm) waist fractures:
- Below-elbow cast immobilization (thumb inclusion not mandatory) for 6 weeks
- 90% union rate with conservative treatment 2
- CT scan at 6 weeks to confirm union (≥50% trabecular bridging) 5
Moderately displaced (0.5-1.5 mm) waist fractures:
- Extended cast immobilization for 8-10 weeks 2
- Consider surgical fixation for athletes or those requiring early return to function
Displaced fractures (≥1.5 mm):
- Surgical internal fixation is recommended 2
- All proximal pole fractures should generally undergo surgical fixation 2, 6
Distal pole fractures:
- Conservative treatment with 4-6 weeks immobilization
- High union rates 2
Critical Pitfalls to Avoid
Do not treat presumed contusions with prolonged casting without confirming absence of fracture - this leads to unnecessary immobilization in >90% of cases 4
Do not rely on serial radiographs alone - fractures may not become visible for weeks, during which time improper treatment increases nonunion risk 4
Do not use clinical examination alone - while physical exam combined with radiography is useful, MRI significantly changes management in two-thirds of cases with persistent symptoms 3
Assess union with CT, not radiographs - CT is superior for determining trabecular bridging and true healing 5
Evidence Quality Note
The ACR Appropriateness Criteria 3 provide the strongest guideline-level evidence, emphasizing that MRI without contrast is the gold standard for detecting occult fractures when radiographs are negative but clinical suspicion remains high. Recent research 2, 5 supports aggressive early imaging to avoid overtreatment of contusions while preventing undertreatment of occult fractures that could progress to nonunion and osteoarthritis.