Elbow Terrible Triad Injury

The elbow terrible triad injury is a severe and unstable fracture–dislocation pattern consisting of three key components:

1. Elbow dislocation
2. Radial head (or neck) fracture
3. Coronoid process fracture

This injury pattern was described by Hotchkiss in 1996 and is termed “terrible” due to its historically poor outcomes and high complication rates.

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Epidemiology & Clinical Significance

• Represents a complex elbow instability pattern
• Frequently associated with significant soft tissue injury (capsule and ligaments)
• Often leads to functional impairment if not treated appropriately

The elbow is inherently a stable joint; therefore, disruption of both bony and ligamentous stabilizers results in marked instability.

See Also: Elbow Joint Anatomy

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Mechanism of Injury

Typically caused by:

• Fall on an outstretched hand (FOOSH)
• Axial load applied to an extended elbow
• Combined valgus stress + forearm rotation + axial compression

This leads to sequential failure of stabilizing structures:

• Lateral collateral ligament complex
• Radial head
• Coronoid process

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Pathoanatomy

The Elbow Terrible Triad Injury disrupts both:

1. Primary bony stabilizers

• Radial head → resists valgus and axial load
• Coronoid process → prevents posterior displacement

2. Soft tissue stabilizers

• Lateral collateral ligament (LCL)
• Medial collateral ligament (MCL)
• Joint capsule

Loss of these structures results in gross elbow instability.

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Clinical Presentation

Patients typically present with:

• Severe elbow pain and swelling
• Visible deformity (due to dislocation)
• Limited range of motion
• Possible neurovascular symptoms (e.g., ulnar nerve involvement)

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Diagnosis

Imaging

• X-ray: confirms dislocation and fractures
• CT scan: essential for detailed fracture assessment and surgical planning

Clinical assessment

• Evaluate joint stability after reduction
• Assess neurovascular status

See Also: Elbow X-Ray Views

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Elbow Terrible Triad Injury Treatment

Initial Treatment

• Urgent closed reduction of dislocated elbow
• Immobilization in flexion

See Also: Nursemaid Elbow reduction

Definitive treatment

Most Terrible Triad Injury cases require surgical management due to instability:

• Open reduction and internal fixation (ORIF) of coronoid
• Radial head fixation or replacement
• LCL repair (essential step)
• MCL repair if instability persists

Non-operative management (selected cases)

Only considered when:

• Joint is stable after reduction
• Fractures are small and non-displaced
• Early motion is possible

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Rehabilitation

• Early range of motion (ROM) is critical
• Avoid prolonged immobilization to prevent stiffness
• Progressive strengthening begins after ~6 weeks

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Complications

Elbow Terrible triad injuries are associated with high complication rates, including:

• Elbow stiffness (most common)
• Post-traumatic arthritis
• Recurrent instability
• Heterotopic ossification
• Ulnar neuropathy
• Nonunion or fixation failure
• Infection

Reoperation rates can be significant, reported up to ~22–30% or higher in some series.

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Prognosis

• Outcomes have improved with modern surgical protocols.
• However, residual stiffness and functional limitation are common after Elbow Terrible Triad Injury.
• Early diagnosis, anatomical repair, and early mobilization are key to better outcomes.

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Key Clinical Takeaways

• Despite advances, complications remain frequent, requiring careful follow-up
• The elbow terrible triad is a highly unstable elbow injury requiring urgent attention
• Surgical stabilization is the mainstay of treatment in most cases
• Early mobilization is crucial to avoid stiffness

References & More

1. Stevens KA, Tiwari V. Terrible Triad of the Elbow. [Updated 2023 Aug 3]. In: StatPearls [Internet]. Treasure Island (FL): StatPearls Publishing; 2026 Jan-. Available from: Pubmed
2. Fahs A, Waldron J, Afsari A, Best B. Management of Elbow Terrible Triad Injuries: A Comprehensive Review and Update. J Am Acad Orthop Surg. 2024 Oct 1;32(19):e982-e995. doi: 10.5435/JAAOS-D-24-00310. Epub 2024 Aug 13. PMID: 39151182. Pubmed
3. Egol KA. Handbook of fractures. 6th ed. Philadelphia: Lippincott Williams & Wilkins; 2019.