Management of Nondisplaced Coracoid Process Fracture
Nondisplaced coracoid process fractures should be managed conservatively with immobilization in a sling for 4-6 weeks, followed by progressive rehabilitation, with clinical and radiographic follow-up at 6 and 12 weeks to confirm healing. 1, 2
Initial Imaging and Diagnosis
Start with three-view shoulder radiographs (AP, scapular-Y, and axillary views) as the initial imaging study 3, 4. The axillary view is critical—diagnosis rates improve from 33% with two views to 88% with three views 1. Coracoid fractures are frequently missed on initial radiographs (missed in 38% of cases), so maintain high clinical suspicion 1.
If radiographs are negative but clinical suspicion remains high, obtain CT without IV contrast to identify occult fractures 3. CT provides superior characterization of fracture patterns and displacement 4.
Classification and Treatment Decision
Classify the fracture using the Ogawa system:
- Type I: Fracture posterior to coracoclavicular ligament attachment (77% of cases)
- Type II: Fracture anterior to coracoclavicular ligament attachment (19% of cases) 5
Conservative Management Indications (Your Patient)
For nondisplaced fractures (displacement <1 cm), conservative treatment is appropriate and yields excellent outcomes in 94% of cases 1, 2. This applies to:
- Isolated Type II fractures
- Type I fractures WITHOUT multiple disruptions of the superior shoulder suspensory complex (SSSC) 6, 5
Critical caveat: Assess for associated injuries—81% of coracoid fractures have concurrent shoulder girdle injuries 1. Look specifically for:
- Acromioclavicular joint disruption (33%)
- Clavicle fracture (17%)
- Acromion/lateral scapular spine fracture (15%)
- Anterior shoulder instability (11%) 5
If multiple SSSC disruptions are present (AC joint dislocation + coracoid fracture), surgical fixation is indicated in 76% of cases 5.
Conservative Treatment Protocol
Immobilization phase (0-4 weeks):
- Sling immobilization for 4-6 weeks 2
- Avoid active shoulder motion
Rehabilitation phase (4-12 weeks):
- Begin passive range-of-motion exercises at 4-6 weeks
- Progress to active-assisted exercises at 6-8 weeks
- Initiate strengthening exercises at 12 weeks 7
Follow-Up Schedule
Week 6:
- Clinical examination for tenderness, range of motion
- Radiographs (three views) to assess fracture alignment and early healing 7
Week 12:
- Clinical examination for pain, function
- Radiographs to confirm fracture union 7
- If healed, advance to full strengthening program
6 months (if symptoms persist):
- Consider CT or MRI to evaluate for nonunion 2
- Nonunion risk is significant when fractures go undiagnosed initially 8
Red Flags Requiring Surgical Referral
Refer for surgical fixation if:
- Displacement >1 cm 2
- Multiple SSSC disruptions (Type I fracture + AC dislocation or clavicle fracture) 6, 5
- Painful nonunion develops 2
- Progressive displacement on follow-up imaging
Important pitfall: Half of coracoid fractures occur with low-energy trauma, correlating with higher rates of nondisplaced fractures 1. Don't dismiss the diagnosis based on mechanism alone—maintain vigilance even with minor trauma mechanisms.