Fracture of Necessity | ORIF Required | DRUJ Instability | Adult vs Pediatric Difference
- Fracture of Necessity - virtually always requires ORIF in adults
- DRUJ instability is the key associated injury - always assess
- Anatomic radius reduction usually restores DRUJ stability
- Pediatric Galeazzi often treated conservatively (different than adults)
- Compare to Monteggia: Galeazzi = Distal (DRUJ), Monteggia = Proximal (radial head)
- “G for GRUJ (distal), M for MPRUJ (proximal) - mnemonic for location
- “Supination after fixation usually stabilizes DRUJ
- “Brachioradialis deforming force causes shortening
- “Check ulnar styloid - base fracture indicates DRUJ disruption
Called the fracture of necessity because operative treatment is essentially mandatory in adults. Conservative management leads to high failure rates (92% failure).
The DRUJ is ALWAYS disrupted. After radius fixation, test DRUJ stability in supination and pronation. Most stable in supination.
Children under 10 can often be treated conservatively with cast. Adults always need surgery. This is a common exam question contrast.
Fix the radius fracture first with anatomic reduction and compression plating. This alone often restores DRUJ stability (80%).
- Decision
- ORIF radius with plate
- Key Point
- Assess DRUJ after fixation
- Decision
- Supination cast 6 weeks
- Key Point
- Most common outcome (80%)
- Decision
- Pin DRUJ in supination or repair TFCC
- Key Point
- Occurs in 20%
- Decision
- Consider conservative management
- Key Point
- Different from adults
- Decision
- Indicates DRUJ disruption
- Key Point
- Fix if DRUJ unstable after radius
- Decision
- Urgent debridement then ORIF
- Key Point
- Standard open fracture protocol
GRIPS vs MUGSSGaleazzi vs Monteggia Location
Hook:Galeazzi = Radius fracture + Inferior (distal) radioulnar joint disruption!
SUPINATEDRUJ Stability Position
Hook:SUPINATE - DRUJ is most stable in supination position!
RDComponents of Galeazzi Injury
Hook:RD - Radius fracture plus DRUJ disruption equals Galeazzi!
BPQDeforming Forces
Hook:BPQ muscles cause the classic Galeazzi deformity pattern!
Overview and Introduction
What is a Galeazzi Fracture?
A Galeazzi fracture-dislocation consists of:
- Fracture of the radius shaft (typically junction of middle and distal thirds)
- Disruption of the DRUJ (distal radioulnar joint)
The DRUJ disruption may be:
- True dislocation
- Subluxation
- Ulnar styloid base fracture (Galeazzi equivalent)
First described by Riccardo Galeazzi in 1934. Called the fracture of necessity by Hughston (1957) because operative treatment is necessary for good outcomes in adults.
Epidemiology
- 3-7% of all forearm fractures
- Less common than Monteggia fractures
- Male predominance (3:1)
- Peak age 30-40 years
- Fall on outstretched hand with forearm pronated (most common)
- Direct blow to dorsoradial forearm
- Axial load on hyperpronated wrist
- High-energy trauma (motor vehicle accidents)
Galeazzi vs Monteggia - Key Differences
- Galeazzi
- Radius (distal)
- Monteggia
- Ulna (proximal)
- Galeazzi
- DRUJ (distal)
- Monteggia
- Radiocapitellar (proximal)
- Galeazzi
- Ulna from radius (DRUJ)
- Monteggia
- Radial head
- Galeazzi
- Always ORIF
- Monteggia
- Usually ORIF
- Galeazzi
- Conservative possible under age 10
- Monteggia
- Often conservative
Anatomy and Pathophysiology
Distal Radioulnar Joint (DRUJ) Anatomy
- Ulnar head articulates with sigmoid notch of radius
- Radius rotates around relatively fixed ulna (180° rotation)
- Shallow articulation - relies heavily on soft tissue stability
- Articular surface coverage approximately 60°
- TFCC (triangular fibrocartilage complex) - primary stabilizer
- Dorsal and volar radioulnar ligaments (components of TFCC)
- Pronator quadratus
- Interosseous membrane (central band)
- ECU subsheath
- Ulnocarpal ligaments
The shallow sigmoid notch provides minimal bony constraint to DRUJ stability. The TFCC and IOM are the primary stabilizers. In Galeazzi fractures, the IOM is disrupted, and TFCC is often torn, leading to DRUJ instability that persists even after radius fracture fixation.
Deforming Forces
- Pulled proximally by biceps and supinator
- Variable rotation depending on fracture level
- Tends to supinate if fracture is proximal to pronator teres
- Shortened by brachioradialis (primary deforming force)
- Pronated by pronator quadratus
- Typically apex dorsal angulation
- Flexed by wrist flexors
- Radius shortening
- Angular deformity (apex dorsal)
- Loss of radial bow
- DRUJ incongruity with ulnar head prominence
Interosseous Membrane Role
- Primary longitudinal stabilizer of forearm
- Transmits 80% of axial load from radius to ulna
- Disrupted in Galeazzi fractures
- Runs obliquely from radius to ulna (proximal-distal)
- IOM disruption contributes to radius shortening
- May prevent closed reduction
- Contributes to persistent DRUJ instability
- Must be considered when assessing DRUJ stability after fixation
Classification Systems
Classification by Radial Fracture Location
- Location
- Junction middle/distal thirds
- Clinical Significance
- Classic Galeazzi pattern, high DRUJ instability (most common)
- Location
- True mid-shaft radius
- Clinical Significance
- Less DRUJ instability but still assess carefully
- Location
- Proximal third radius
- Clinical Significance
- Rare, consider Essex-Lopresti variant with IOM disruption
The classic Galeazzi fracture occurs at the junction of the middle and distal thirds of the radius. More distal fractures have HIGHER DRUJ instability risk. Fractures in the proximal third should raise suspicion for Essex-Lopresti injury (complete IOM disruption with proximal radius migration).
The topic flags Essex-Lopresti as a Galeazzi variant; it must be developed, because missing it is a classic exam disaster. The Essex-Lopresti injury is a triad of radial head fracture + complete longitudinal interosseous membrane (central band) disruption + DRUJ dissociation - that is, longitudinal instability of the whole forearm, allowing the radius to migrate proximally.
- Mechanism: high-energy axial load through the forearm.
- The trap: it is frequently missed because attention fixes on the radial head. Any radial head fracture with wrist/ulnar-sided pain, or with proximal radial migration, is Essex-Lopresti until proven otherwise.
- Assessment: check for DRUJ tenderness and a positive ballottement, and compare radial length to the contralateral wrist; the radius pull ("criss-cross") test under fluoroscopy (proximal radial translation of more than about 3 mm) confirms longitudinal instability.
- The critical principle: NEVER simply excise the radial head in a suspected Essex-Lopresti - the radial head is the last longitudinal stabiliser, and excision causes catastrophic proximal radial migration, ulnar impaction and chronic wrist pain. Instead preserve and fix the radial head, or replace it with a metal prosthesis (never a silastic spacer), then address the DRUJ (reduce and pin in supination). Acute interosseous-membrane repair is difficult and chronic cases are very hard to salvage - so recognition at presentation is everything.
Clinical Assessment
History Taking
- Fall on outstretched hand (FOOSH) - most common
- Forearm typically in pronation at time of impact
- Direct blow to dorsal forearm
- Sporting injury (cycling, contact sports)
- Motor vehicle accident (high energy)
- Forearm pain and swelling
- Wrist pain (DRUJ involvement)
- Visible deformity
- Inability to supinate or pronate forearm
- Weakness of grip
Physical Examination
- Forearm deformity and swelling
- Wrist swelling (especially dorsal - DRUJ area)
- Prominent ulnar head dorsally (DRUJ dislocation)
- Skin integrity - check for open fracture
- Radial shortening compared to opposite side
- Point tenderness at radius fracture site
- DRUJ tenderness dorsally
- Ulnar styloid - check for base fracture
- Interosseous membrane tenderness
- Compartment assessment
- Limited and painful supination/pronation
- Usually cannot rotate forearm
- Wrist motion limited by pain
- Median nerve: Sensation first web space, thumb opposition
- Ulnar nerve: Sensation little finger, finger abduction
- Radial nerve: Wrist/finger extension, sensation dorsal first web space
- Vascular: Radial and ulnar pulses, capillary refill
DRUJ Stability Testing
- Stabilize radius firmly with one hand
- Translate ulna dorsally and volarly with other hand
- Assess amount of translation and compare to contralateral side
- Test in supination, neutral, and pronation positions
- Note position of maximum stability (usually supination)
- Increased translation compared to opposite side = instability
- Pain with testing indicates ligament injury
- Dorsal prominence of ulnar head = DRUJ dislocation
- Usually most stable in supination
Differential Diagnosis
- Distinguishing Features
- Distal-third radius shaft fracture PLUS DRUJ disruption
- Key Discriminator
- DRUJ widening/dorsal ulnar prominence with an isolated radius fracture
- Distinguishing Features
- Radius fracture with a congruent, stable DRUJ on imaging and exam
- Key Discriminator
- Normal DRUJ - the defining absence
- Distinguishing Features
- Proximal ULNA fracture PLUS radial head dislocation
- Key Discriminator
- Pathology is proximal (radiocapitellar), not distal (DRUJ)
- Distinguishing Features
- Fractures of both radius and ulna shafts
- Key Discriminator
- Ulna is also fractured; DRUJ usually intact
- Distinguishing Features
- Radial head fracture, complete IOM disruption and DRUJ dissociation
- Key Discriminator
- Proximal radial migration; tenderness along the whole IOM and elbow
- Distinguishing Features
- Metaphyseal distal radius fracture; DRUJ may be involved via ulnar styloid
- Key Discriminator
- Fracture is metaphyseal/intra-articular, not diaphyseal shaft
- Distinguishing Features
- DRUJ disruption without a radial shaft fracture
- Key Discriminator
- No diaphyseal radius fracture present
Investigations
Radiographic Assessment
- Full-length forearm radiographs (AP and lateral)
- MUST include both elbow and wrist joints
- Dedicated wrist views (PA and lateral)
- Contralateral forearm for comparison if needed
- Radius fracture at middle-distal junction (typical)
- DRUJ widening (greater than 2mm asymmetry)
- Increased space between radius and ulna at DRUJ
- Ulnar styloid base fracture (suggests DRUJ disruption)
- Radial shortening relative to ulna
- Dorsal subluxation of ulnar head
- Apex dorsal angulation of radius fracture
- Loss of normal DRUJ relationship
- Distal radius volar displacement possible
On the AP view, look for DRUJ widening - greater than 2mm difference compared to opposite wrist is abnormal. On the lateral view, look for dorsal prominence of the ulnar head. Always obtain full forearm X-rays including both joints to avoid missing associated injuries.
CT Scanning
- Assess DRUJ congruity when plain films unclear
- Complex intra-articular fracture patterns
- Pre-operative planning for comminuted fractures
- Post-operative assessment if DRUJ reduction questioned
- Chronic DRUJ instability evaluation
- Detailed sigmoid notch anatomy and fracture fragments
- Quantification of DRUJ subluxation
- Associated fracture fragments (ulnar styloid)
- Articular step-off assessment
MRI Scanning
- Rarely needed in acute setting
- May be useful in delayed or chronic cases
- TFCC assessment (tears, quality)
- Chronic DRUJ instability evaluation
- Persistent unexplained symptoms post-treatment
- IOM assessment in suspected Essex-Lopresti
- TFCC tears (central perforations or peripheral detachments)
- IOM disruption
- Ligament injuries
- Cartilage damage
Management Algorithm
Treatment Decision Tree
- Treatment
- ORIF radius with plate
- Key Points
- Fracture of necessity - always operative
- Treatment
- Consider closed reduction and cast
- Key Points
- Conservative possible if reduction acceptable
- Treatment
- ORIF radius with plate
- Key Points
- Treat as adult
- Treatment
- Supination cast 6 weeks
- Key Points
- Most common outcome (80%)
- Treatment
- Pin DRUJ or repair TFCC
- Key Points
- Occurs in 20% of cases
- Treatment
- Urgent debridement then ORIF
- Key Points
- Standard open fracture protocol
Surgical Technique
ORIF of Radius Fracture
- Review full forearm X-rays including DRUJ
- Plan approach based on fracture location
- Template plate size and length
- Consent for possible DRUJ stabilization
- Supine on operating table
- Arm on radiolucent hand table
- Tourniquet on upper arm (may not inflate if checking DRUJ stability without tourniquet)
- C-arm positioned for AP and lateral views
Careful pre-operative planning facilitates smooth surgical execution.
Complications
Early Complications (0-6 weeks)
- Forearm compartments at risk (volar and dorsal)
- Monitor closely in first 48 hours post-operatively
- Clinical diagnosis: Pain out of proportion, pain with passive stretch
- Treatment: Urgent fasciotomy if diagnosed
- Superficial radial nerve: At risk with volar approach (lies on brachioradialis)
- PIN: At risk with dorsal approach (emerges through supinator)
- Median nerve: Rare but possible with volar approach
- Posterior interosseous artery: Can bleed with dorsal approach
- Infection (1-2% risk)
- Wound dehiscence
- Hematoma
- Most common early problem
- May become apparent after cast removal
- Requires assessment and possible secondary stabilization
Late Complications (After 6 weeks)
- Most common late complication (10-15%)
- Causes: Inadequate initial stabilization, missed TFCC tear, malunion
- Presentation: Pain, weakness, clicking, instability sensation
- Treatment: TFCC reconstruction, ulnar styloid ORIF if chronic nonunion
- Salvage: Darrach procedure or Sauve-Kapandji if severe
- Causes: Inadequate reduction, loss of fixation
- Manifestations: Shortened radius, angular deformity, loss of bow
- Consequences: DRUJ incongruity, loss of rotation, pain
- Treatment: Corrective osteotomy if symptomatic
- Rare with rigid plate fixation (less than 2%)
- Risk factors: Inadequate fixation, infection, smoking
- Treatment: Revision ORIF with bone graft
- Supination/pronation loss (most common residual deficit)
- Causes: DRUJ problems, malunion, soft tissue contracture
- Prevention: Early motion protocol, anatomic reduction
- Heterotopic ossification (rare)
- Radioulnar synostosis (very rare)
- Post-traumatic arthritis (DRUJ or radiocarpal)
- Hardware prominence or irritation
- Chronic regional pain syndrome (CRPS)
Complication Prevention Strategies
- Ensure anatomic radius length restoration
- Test DRUJ stability intraoperatively under direct vision
- Immobilize in supination for 6 weeks
- Pin if unstable (do not ignore instability)
- Anatomic reduction of radius fracture
- Restore radial bow (10-12°)
- Adequate plate fixation (3 screws minimum each side)
- Assess reduction fluoroscopically before closure
- Early finger and elbow motion (immediate)
- Wrist motion after 6 weeks once healed
- Avoid prolonged rigid immobilization beyond 6 weeks
- Supervised hand therapy
- Careful surgical dissection
- Identify and protect nerves (superficial radial nerve, PIN)
- Avoid excessive retraction
- Post-operative nerve examination and documentation
Chronic DRUJ Instability and the Missed Galeazzi
A missed Galeazzi (or persistent post-fixation DRUJ instability) presents late with ulnar-sided wrist pain, weakness, painful clicking and loss of rotation - and the reconstructive ladder is examinable, not just the salvage names dropped above.
- Correct the bone first: a radial malunion (shortening or lost bow) must be addressed by corrective osteotomy before any DRUJ procedure, because residual incongruity perpetuates instability.
- Soft-tissue reconstruction (younger patient, congruent non-arthritic joint): anatomic dorsal-and-volar radioulnar ligament reconstruction with a tendon graft - the Adams-Berger procedure - restores the TFCC stabilisers.
- Salvage for the arthritic/incongruent DRUJ:
- Darrach (distal ulna resection): simple, reliable pain relief, best for the low-demand/elderly patient; risks painful radioulnar convergence and stump instability in the young and active.
- Sauve-Kapandji (DRUJ arthrodesis plus a proximal distal-ulna pseudarthrosis): preserves the ulnar buttress/support of the carpus while restoring forearm rotation - favoured in younger, higher-demand patients (can also develop proximal-stump instability).
- Ulnar head (or total DRUJ) arthroplasty: preserves load transfer and avoids the convergence problems of resection.
Exam point: fix the radius first, reconstruct the radioulnar ligaments (Adams-Berger) in the young congruent joint, and choose Darrach (low-demand) versus Sauve-Kapandji (young/high-demand) versus ulnar head replacement for the arthritic DRUJ.
Postoperative Care and Rehabilitation
Rehabilitation Protocol Timeline
Galeazzi Fracture Rehabilitation Protocol
Above-elbow cast or splint in supination (if DRUJ stable) or sugar-tong splint. Elevation of limb. Finger ROM exercises encouraged. Wound checks at 2 weeks. Maintain shoulder and elbow mobility.
Convert to below-elbow cast if DRUJ stable (elbow ROM allowed). Continue finger exercises. K-wires remain in place if DRUJ pinned. Radiographs at 6 weeks to assess healing.
Remove cast and K-wires. Begin active wrist ROM exercises. Active pronation-supination exercises started. Gentle strengthening if union confirmed. Hand therapy referral.
Progressive strengthening program. Return to sport when ROM and strength recovered (usually 3-4 months). Hardware removal if symptomatic (typically 12+ months). Full recovery expected by 6 months.
If DRUJ Stable Post-Fixation (80% of cases)
- Week 0-2: Above-elbow splint in supination with elbow 90°
- Week 2-6: Convert to below-elbow cast in neutral or slight supination
- Week 6: Remove cast, begin wrist ROM
- Supination tightens dorsal DRUJ ligaments
- Brings radius over ulna into reduced position
- Minimizes stress on healing TFCC
- Immediate: Finger ROM (all joints), grip strengthening
- Week 2: Elbow ROM exercises
- Week 6: Wrist flexion/extension, forearm rotation
- Week 8: Strengthening exercises
Expected outcome is excellent with full ROM recovery in 95% of cases.
If DRUJ Required Stabilization (20% of cases)
- Above-elbow cast in supination for 4-6 weeks
- K-wire removal at 6 weeks (in clinic, no anesthesia needed)
- Protected motion for additional 2-4 weeks
- Total immobilization 8-10 weeks
- Above-elbow cast for 4 weeks
- Below-elbow cast for additional 2 weeks
- Protected ROM exercises then hand therapy
- Total immobilization 6-8 weeks
When DRUJ is unstable, immobilize in supination. This position tightens the dorsal radioulnar ligaments and brings the radius over the ulna into reduced position. Pronation will cause the DRUJ to subluxate dorsally due to laxity of volar ligaments. This is based on cadaveric studies showing maximum DRUJ stability in supination.
Physiotherapy Protocol
- Full pronation-supination ROM (80° each)
- Wrist flexion/extension 60° minimum
- Grip strength 90% of opposite side
- Pain-free wrist and forearm function
- Return to pre-injury activities
- Typical full recovery: 3-6 months
- Persistent DRUJ instability or clicking
- Progressive loss of motion after initial gains
- New neurological symptoms (weakness, numbness)
- Signs of compartment syndrome (severe pain, tense forearm)
- Wound complications (redness, drainage, dehiscence)
- Failure to progress with therapy
Follow-up Schedule
- 2 weeks: Wound check, X-ray (ensure no loss of reduction)
- 6 weeks: Remove cast/K-wires, X-ray (assess union), begin wrist ROM
- 12 weeks: X-ray, assess ROM and strength
- 6 months: Final assessment, return to full activities
- Fracture united (bridging callus on 3 cortices)
- DRUJ stable clinically
- ROM at least 80% of opposite side
- Pain minimal or absent
- Patient satisfied with function
Outcomes and Prognosis
Treatment Outcomes by Method
- Success Rate
- 92%
- Clinical Notes
- Standard approach, excellent outcomes expected
- Success Rate
- 85%
- Clinical Notes
- For unstable DRUJ after fixation, good outcomes
- Success Rate
- 8%
- Clinical Notes
- High failure rate - do not use in adults
- Success Rate
- 85%
- Clinical Notes
- Acceptable option in young children
Prognostic Factors
Favorable Prognostic Factors:
- Younger age (under 50 years)
- Child under 10 years (if conservative)
- No smoking
- Good compliance with rehabilitation
- No significant comorbidities
- Anatomic radius reduction achieved
- DRUJ stable after radius fixation
- Early surgery (under 1 week)
- Rigid plate fixation
- Early mobilization protocol followed
Unfavorable Prognostic Factors:
- High-energy mechanism
- Open fracture
- Significant soft tissue injury
- Comminuted fracture pattern
- Associated injuries
- Residual radius malreduction
- Persistent DRUJ instability
- Delay to surgery (over 2 weeks)
- Inadequate fixation
- Loss of radial bow
Expected Outcomes
- 95% achieve at least 80% of opposite side pronation-supination
- Wrist flexion/extension usually full or near-full
- Elbow ROM should be full
- Grip strength recovers to 85-95% of opposite side
- Time to full strength: 4-6 months
- Light activities: 6-8 weeks
- Heavy labor: 3-4 months
- Contact sports: 4-6 months
- Full unrestricted activity: 6 months
- 10-15% have mild residual DRUJ discomfort
- 5-10% have permanent minor loss of rotation
- Less than 5% have significant disability
Guidelines, Registries & Global Practice
Global Epidemiology
Galeazzi fracture-dislocations are uncommon, classically quoted as roughly 3-7% of forearm fractures and far less frequent than isolated diaphyseal or distal radius fractures. They sit within the young-adult, higher-energy diaphyseal forearm fracture group described in the reference population-based epidemiology of adult fractures (Court-Brown & Caesar, Injury 2006; PMID 16814787). Typical mechanisms worldwide are a fall on the outstretched, pronated hand, a direct dorsoradial blow, road-traffic and sporting trauma, with a male predominance and a peak in the second-to-fourth decades.
- Position on Adult Galeazzi
- Diaphyseal radius fracture with DRUJ injury: anatomic ORIF with a 3.5 mm compression/locking plate; restore length, bow and rotation; assess and stabilise the DRUJ
- Evidence Level
- Expert consensus / Level IV-V
- Position on Adult Galeazzi
- Operative fixation is standard for displaced adult forearm-shaft fractures; non-operative care reserved for selected paediatric injuries
- Evidence Level
- Level IV-V consensus
- Position on Adult Galeazzi
- Open injuries: urgent debridement and combined ortho-plastic care; definitive ORIF once soft tissues allow
- Evidence Level
- Standard of care / guideline
- Position on Adult Galeazzi
- Concordant: 'fracture of necessity' - adult Galeazzi requires ORIF with intra-operative DRUJ assessment
- Evidence Level
- Expert consensus
- Position on Adult Galeazzi
- Closed reduction and casting reasonable in younger children with acceptable alignment and a reduced DRUJ; operative fixation for older children/adolescents and irreducible/unstable patterns
- Evidence Level
- Level IV
There is no high-level RCT or dedicated society guideline specific to Galeazzi fractures - the evidence base is case series and expert consensus (Level IV-V). Across AO, AAOS/OTA, BOA and European teaching the recommendation is uniform: anatomic radial ORIF plus intra-operative DRUJ assessment in adults. Differences are in emphasis (e.g. BOAST open-fracture pathways), not in principle.
Registry Evidence
National joint and fracture registries (NJR, AJRR, AOANJRR, the Swedish/SHAR and Norwegian registries) are arthroplasty-focused and do not capture Galeazzi-specific outcomes, so registry-level survival data are not available for this injury. The best available evidence remains operative case series reporting good-to-excellent results in the large majority of anatomically reduced adults, with residual DRUJ problems as the dominant late issue (see Evidence Base).
Global Practice Variation
- High-resource settings: routine plate ORIF on a radiolucent hand table with intra-operative fluoroscopy and formal DRUJ testing; hand-therapy-led rehabilitation.
- Limited-resource settings: the same biomechanical priorities apply, but elastic intramedullary nailing or external fixation may be used where plating implants or image intensifiers are scarce; anatomic radial length and DRUJ reduction remain the non-negotiable goals.
- Universal medicolegal point: the dominant pitfall worldwide is a missed DRUJ injury - every forearm radiograph must include the wrist, and DRUJ stability after radial fixation must be documented.
MCQ Practice Points
Q: What are the two essential components of a Galeazzi fracture-dislocation?
A: Fracture of the radius shaft (typically at junction of middle and distal thirds) PLUS DRUJ disruption (dislocation or subluxation of the distal radioulnar joint). Both components must be present for the diagnosis.
Q: Why is the Galeazzi fracture called the "fracture of necessity"?
A: Because operative treatment is necessary in adults for good outcomes. Conservative management has a 92% failure rate in adults, while surgical treatment (ORIF with plate) achieves 92% success rate. This term was coined by Hughston in 1957.
Q: In what position is the DRUJ most stable, and why is this clinically important for Galeazzi fractures?
A: The DRUJ is most stable in supination because this position tightens the volar radioulnar ligament and brings the radius over the ulna. After Galeazzi repair, the forearm is immobilized in supination to maximize DRUJ stability during healing. This is based on biomechanical studies.
Q: How does a Galeazzi fracture differ from a Monteggia fracture in terms of anatomic location?
A:
- Galeazzi = Radius fracture (distal) + DRUJ disruption (distal joint)
- Monteggia = Ulna fracture (proximal) + Radial head dislocation (proximal joint)
Mnemonic: G for GRUJ (distal), M for MPRUJ (proximal)
Q: How does treatment of Galeazzi fractures differ between children and adults?
A:
- Adults: Always require ORIF with plate fixation (92% failure with conservative treatment)
- Children under 10: Can often be treated conservatively with closed reduction and cast in supination (85% success rate)
- Children over 10: Should be treated like adults with ORIF
This age-based difference is due to remodeling potential in young children.
Q: What is the most common complication after Galeazzi fracture treatment and how can it be prevented?
A: Persistent DRUJ instability is the most common complication (10-15% of cases). Prevention strategies include:
- Achieving anatomic radius reduction (restoring length and bow)
- Testing DRUJ stability intraoperatively after radius fixation
- Immobilizing in supination for 6 weeks
- Pinning DRUJ if unstable (do not ignore instability)
Clinical Decision Scenarios
Practise clinical reasoning and management decisions out loud
“A 35-year-old man presents to the emergency department after falling from his bicycle onto his outstretched hand. X-rays show a fracture of the radius at the junction of the middle and distal thirds with DRUJ widening visible on the AP view. How do you manage this patient?”
“An 8-year-old girl fell on the playground. X-rays show a greenstick fracture of the distal radius with DRUJ widening. Her mother asks if surgery is needed. How do you counsel them and what is your treatment plan?”
“You have just completed ORIF of a Galeazzi fracture with anatomic reduction confirmed on fluoroscopy. However, when you test the DRUJ with the tourniquet down, it is grossly unstable in all positions of rotation. What is your approach and what are your options?”
Definition
- Radius fracture (middle-distal junction)
- PLUS DRUJ disruption (always present)
- Fracture of necessity = always ORIF in adults
- 3-7% of forearm fractures, peak age 30-40
Galeazzi vs Monteggia
- Galeazzi: Radius + DRUJ (distal)
- Monteggia: Ulna + radial head (proximal)
- G for GRUJ (distal), M for MPRUJ (proximal)
- Both usually need ORIF in adults
Surgical Approach
- ORIF radius FIRST (volar Henry approach)
- 3.5mm plate, 6+ cortices each side
- Restore length, bow (10-12°), rotation
- Test DRUJ stability after fixation
- 80% stable, 20% need additional procedure
DRUJ Management
- Test in supination, neutral, pronation
- Compare to opposite wrist (key!)
- Most stable in supination position
- If unstable: pin in supination 6 weeks
- Alternative: TFCC repair, styloid fixation
Immobilization
- Above-elbow cast in SUPINATION
- Supination tightens DRUJ ligaments
- 6 weeks total immobilization
- K-wires removed at 6 weeks if used
- Begin wrist ROM after cast removal
Pediatric Difference
- Under 10 years: Conservative OK (85% success)
- Closed reduction + cast in supination
- Weekly X-rays to monitor reduction
- Over 10 years: Treat like adults (ORIF)
- Remodeling potential key factor
Key Evidence & Outcomes
- Conservative in adults: 92% FAILURE
- ORIF in adults: 92% SUCCESS
- Anatomic radius reduction → DRUJ stability
- Hughston 1957: 'Fracture of necessity'
- Complications: DRUJ instability (10-15%)
Exam Traps to Avoid
- Don't attempt conservative in adults
- Don't forget to assess DRUJ intraop
- Don't immobilize in pronation
- Don't ignore ulnar styloid base fracture
- Don't treat all children with surgery
Evidence Base
The 'Fracture of Necessity' Concept (Landmark)
- Classic case series of distal radial shaft fractures (Galeazzi pattern) documenting that closed/conservative management in adults frequently failed with loss of reduction and DRUJ malalignment
- Established that anatomic reduction and internal fixation of the radius is required for a good outcome in the adult Galeazzi injury
- The associated term 'fracture of necessity' reflects that operative fixation is essentially mandatory in the adult
Treatment-Oriented Classification & DRUJ Instability (Landmark)
- Forty Galeazzi fracture-dislocations treated with ORIF of the radial shaft; fracture location predicted DRUJ instability
- Type I (distal third, within 7.5 cm of the mid-articular distal radius): DRUJ unstable after radial ORIF in 12 of 22 cases (more than half)
- Type II (middle third, more than 7.5 cm from the mid-articular surface): only 1 of 18 was unstable after radial fixation
- Persistent intra-operative DRUJ instability was managed with K-wire transfixion (10 patients) or TFCC repair (3 patients)
DRUJ Bony Incongruity & Soft-Tissue Stability
- The sigmoid notch is shallow with a radius of curvature about 50% greater than the ulnar head, so bony architecture gives minimal inherent DRUJ stability (citing af Ekenstam & Hagert, Scand J Plast Reconstr Surg 1985)
- The TFCC, principally the dorsal and volar radioulnar ligaments, is the major soft-tissue stabiliser of the DRUJ
- Restoration of the radioulnar ligaments best re-establishes the normal DRUJ constraints and kinematics
Paediatric Galeazzi Fractures - Conservative Management
- Reviewed 41 children under 15 years with a radius fracture plus disruption of the inferior (distal) radio-ulnar joint
- Despite the DRUJ injury being initially unrecognised in 41% of cases and varied treatments, final results of conservative management were generally good
- The more distal the radial fracture, the greater the problems encountered
Ulnar Styloid Base Fractures and DRUJ Instability
- Retrospective review of 166 distal radius fractures correlating ulnar styloid fractures with DRUJ instability
- Every distal radius fracture complicated by DRUJ instability was accompanied by an ulnar styloid fracture
- An ulnar styloid base fracture and significant styloid displacement each increased the risk of DRUJ instability
Global Epidemiology of Forearm/Radius Fractures
- Population-based analysis of 5953 adult fractures from a single orthopaedic trauma unit, defining the distribution curves of all adult fractures
- Radial/forearm diaphyseal fractures (which include the Galeazzi pattern) follow a predominantly younger, higher-energy distribution
- Provides the reference epidemiological framework cited worldwide for adult fracture demographics by age and sex