High-yield overview
Radial neck | olecranon | elbow dislocation | medial epicondyle | Monteggia check
5-17%Radial neck share of paediatric elbow fractures
30°Common radial neck reduction threshold
3%Median nerve injury reported after paediatric elbow dislocation
AlwaysCheck radiocapitellar line and medial epicondyle
Practical Pattern Groups
Radial neck fracture
PatternValgus-axial injury with radial neck angulation, displacement or blocked forearm rotation.
TreatmentImmobilise if acceptable; reduce and stabilise if angulated, displaced or mechanically blocked.
Olecranon fracture
PatternDirect blow, fall, avulsion or Monteggia-associated proximal ulna injury.
TreatmentImmobilise if undisplaced and extensor mechanism intact; fix displaced articular or unstable patterns.
Elbow dislocation
PatternSimple dislocation or fracture-dislocation with medial epicondyle, lateral condyle, radial neck, olecranon or coronoid injury.
TreatmentReduce, reassess nerves and films, then operate for incarceration, instability, open injury or fixation-requiring fracture.
Complex paediatric elbow
PatternMore than one injury line, open physes, nerve concern or incongruent joint.
TreatmentTreat as a pattern diagnosis, not as isolated fragments.
Critical Must-Knows
- Do the neurovascular exam before and after reduction. Document median, ulnar and posterior interosseous nerve function.
- A reduced elbow is not a finished assessment. Recheck the medial epicondyle, radiocapitellar line and ulna after reduction.
- Radial neck open reduction is a last resort. It is associated with higher stiffness and vascular complications than closed or percutaneous strategies.
- Olecranon fractures need an extensor mechanism decision. Undisplaced plus intact extension is different from displaced articular disruption.
- Look for Monteggia variants. A radial neck injury with ulna deformity or radiocapitellar malalignment is not an isolated radial neck fracture.
Clinical Pearls
- "Finger MCP and thumb extension test posterior interosseous nerve function.
- "A missing medial epicondyle after dislocation may be trapped in the joint.
- "Radial neck management depends on angulation, translation, rotation block, age, associated injury and success of closed reduction.
- "Olecranon fixation choice is driven by fracture pattern, comminution, skeletal maturity and hardware prominence risk.
The dangerous mistake
Do not reduce a paediatric elbow dislocation, see a congruent joint, and stop. The post-reduction film must show the medial epicondyle in the correct place, the radiocapitellar line through the capitellum, a satisfactory ulnohumeral joint, and no missed radial neck, olecranon, lateral condyle or proximal ulna injury.
At a Glance: What Changes Management?
| Question | What to Check | Management Implication |
|---|---|---|
| Is the hand safe? | Radial pulse, capillary refill, hand temperature, median nerve, ulnar nerve and posterior interosseous nerve. | Vascular compromise, nerve deficit or compartment concern escalates urgency. |
| Is this isolated? | Radiocapitellar line, ulna alignment, medial epicondyle position, olecranon cortex and lateral condyle. | Associated injuries change treatment from simple immobilisation to reduction or fixation. |
| How displaced is the radial neck? | Angulation, translation, rotation block and age. | Acceptable injuries are immobilised; displaced or blocked injuries enter the reduction ladder. |
| Is the olecranon extensor mechanism intact? | Active extension, articular displacement and comminution. | Displaced intra-articular or extensor-disrupted fractures need anatomical reduction and fixation. |
| Is the elbow stable after reduction? | Post-reduction congruity, stress stability and incarcerated fragment. | Stable simple dislocations can mobilise early; unstable or incarcerated patterns need surgery. |
Rapid Recall
SAFEFirst assessment | RINGRadiograph read | LADDERReduction logic |
|---|---|---|
S Skin Open injury, puckering, swelling and threatened skin. | R Radiocapitellar line Must pass through capitellum on every view. | L Less displaced Immobilise if alignment and rotation are acceptable. |
A Artery Pulse, capillary refill, colour and temperature. | I Internal epicondyle Find the medial epicondyle after dislocation. | A Attempt closed Closed reduction first for displaced radial neck and elbow dislocation. |
F Function Median, ulnar and posterior interosseous nerve function. | N Neck and olecranon Measure radial neck and inspect olecranon joint surface. | D Direct percutaneous help Leverage or joystick if closed reduction fails. |
E Elbow films True AP/lateral, associated injury search and post-reduction films. | G Gross ulna alignment Search for Monteggia variant or proximal ulna plastic deformity. | D Drive intramedullary Intramedullary reduction/fixation for selected radial neck fractures. |
E Expose last Open reduction only when lesser methods fail or a fragment is incarcerated. | ||
R Reassess Repeat nerve check and radiographs after every reduction. | ||
SAFE is the order before any reduction. | RING prevents isolated-fragment thinking. | Use a ladder before opening the radial neck. |
Overview/Epidemiology
These injuries sit close together anatomically and clinically. A child can present with a radial neck fracture, olecranon fracture or elbow dislocation, but the surgeon must actively search for the combined pattern. A radial neck fracture can accompany elbow dislocation or Monteggia injury. An olecranon fracture can be part of proximal ulna instability. A reduced elbow dislocation can hide an incarcerated medial epicondyle or nerve entrapment.
Common mechanisms
Mechanism to Injury Pattern
| Mechanism | Likely Pattern | What It Should Trigger |
|---|---|---|
| Fall on outstretched hand with valgus load | Radial neck fracture from compression against the capitellum. | Measure radial neck angulation and check forearm rotation. |
| Posterolateral elbow dislocation mechanism | Elbow dislocation with medial epicondyle avulsion, capsuloligamentous injury or nerve traction. | Find the medial epicondyle and document median/ulnar/PIN function. |
| Direct blow to posterior elbow | Olecranon fracture, often with swelling over the extensor surface. | Assess active extension and articular displacement. |
| Forceful triceps contraction or avulsion | Olecranon apophyseal or proximal ulna avulsion pattern. | Treat displacement and extensor mechanism status as decision points. |
| High-energy fall or sport injury | Biepicondylar fracture-dislocation, radial neck plus dislocation, proximal ulna fracture, or open injury. | Do not call it isolated until the whole elbow and forearm are imaged. |
Radial neck
Think valgus-axial load, angulation, displacement, rotation block and posterior interosseous nerve risk.
Olecranon
Think articular surface, extensor mechanism, proximal ulna alignment and Monteggia variant.
Dislocation
Think reduction, post-reduction films, medial epicondyle, nerve injury and stability.
Surgically Relevant Anatomy
Radial neck and proximal radius
The radial head ossifies in childhood and the radial neck behaves differently from the adult radial head. The periosteal sleeve and physis contribute to remodelling, but severe angulation, translation and mechanical block to rotation are poorly tolerated. The posterior interosseous nerve passes near the proximal radius as it enters the supinator, so nerve function must be documented before and after injury manipulation.
Olecranon and proximal ulna
The olecranon is the triceps insertion and part of the greater sigmoid notch. Treatment depends on whether the articular surface and extensor mechanism remain functional. In a child, the olecranon apophysis and proximal ulna alignment can make the injury look deceptively small, but any proximal ulna deformity should raise concern for radiocapitellar instability.
Elbow dislocation and medial epicondyle
In children, the medial collateral ligament is attached to the medial epicondylar apophysis. A dislocation can therefore avulse the medial epicondyle rather than rupture the ligament midsubstance. During spontaneous or closed reduction, the fragment can become trapped in the ulnohumeral joint. The ulnar nerve runs posterior to the medial epicondyle and the median nerve can rarely be entrapped after dislocation.
Nerve documentation is part of the anatomy
Record median nerve sensation and thenar function, ulnar nerve sensation and intrinsic function, and posterior interosseous nerve motor function. A posterior interosseous nerve palsy is tested by finger MCP extension and thumb extension, not by wrist extension alone.
Pathophysiology
The common theme is failure of the paediatric elbow ring. The visible fracture may be only one part of the instability pattern.
Why The Pattern Behaves This Way
| Injury | Pathophysiology | Clinical Consequence |
|---|---|---|
| Radial neck fracture | Valgus and axial load compress the radial head against the capitellum. The cartilaginous head and physis make displacement harder to appreciate on plain films. | Painful rotation and a mechanical block matter more than the X-ray label alone. |
| Olecranon fracture | The triceps pulls the proximal fragment while the olecranon forms the articular notch of the ulnohumeral joint. | Displacement threatens both the joint surface and active elbow extension. |
| Elbow dislocation | The ulna and radius dislocate relative to the distal humerus, often through posterolateral instability. In children, the medial epicondyle may fail before the ligament midsubstance. | A reduced joint can still hide an incarcerated epicondyle or nerve entrapment. |
| Monteggia variant | Proximal ulna deformity changes the radial head relationship with the capitellum. | Restoring only the radial neck or only the dislocation misses the driver of radiocapitellar malalignment. |
The treatment logic follows the biology. Young children remodel some angulation, but remodelling does not reliably correct severe translation, blocked forearm rotation, joint incongruity, incarcerated fragments or extensor mechanism failure. These are the findings that move treatment from observation to reduction or fixation.
Classification
Classification should help communication and treatment, not replace clinical judgement.
- Acceptable or minimally displaced: low angulation, little translation, no blocked rotation and no associated instability.
- Moderately displaced: angulation around the common reduction threshold, translation, or clinically important loss of rotation.
- Severely displaced or irreducible: marked angulation, major translation, complete displacement, soft-tissue interposition or failed closed reduction.
- Associated injury pattern: elbow dislocation, olecranon/proximal ulna injury or Monteggia variant changes the plan.
Clinical Assessment
History
Ask enough to identify the injury pattern and urgency:
- Mechanism: fall, valgus load, direct posterior blow, dislocation event or high-energy trauma.
- Time from injury and whether the elbow was reduced before assessment.
- Pain location: radial head/neck, olecranon, medial epicondyle or diffuse elbow pain.
- Mechanical block: inability to pronate or supinate suggests radial neck displacement or intra-articular block.
- Neurological symptoms: numbness, paraesthesia, weakness, clawing, inability to extend fingers or thumb.
- Vascular symptoms: cold hand, colour change, severe swelling or escalating analgesic requirement.
- Previous elbow injury, hyperlaxity, sporting demand and hand dominance.
Examination sequence
Look, Feel, Move and Special Checks
| Step | How To Do It | What A Positive Finding Means |
|---|---|---|
| Look | Inspect from front, side and posterior elbow. Note swelling, deformity, bruising, skin puckering, wounds and carrying angle. | Gross deformity suggests dislocation or displaced fracture; posterior swelling localises to olecranon; threatened skin or open injury escalates urgency. |
| Feel | Palpate distal humerus, medial epicondyle, lateral condyle, radial head/neck while gently rotating forearm, olecranon, proximal ulna and wrist. | Focal radial-neck tenderness and painful rotation support radial neck injury; medial tenderness after dislocation suggests epicondyle avulsion; ulna tenderness raises Monteggia concern. |
| Move | If safe, assess active flexion-extension and pronation-supination; do not force movement in a displaced injury. | Blocked rotation suggests radial neck displacement, incarcerated fragment or radiocapitellar problem. |
| Extensor mechanism | Ask the child to actively extend the elbow against gravity if pain and fracture pattern allow. | Loss of active extension with olecranon fracture suggests extensor disruption and supports fixation. |
| Stability after reduction | After reduction, reassess congruity clinically and radiographically; avoid aggressive stress testing in an awake child. | Persistent instability or blocked motion suggests complex dislocation, incarcerated fragment or associated fracture. |
Nerve and vessel tests
Document Before and After Reduction
| Structure | How To Test | Why It Matters |
|---|---|---|
| Perfusion | Radial pulse, capillary refill, hand colour, temperature and pulse oximetry if uncertain. | A cold, pale or poorly perfused hand needs urgent escalation. |
| Median nerve | Light touch to index finger pulp; thumb opposition or thenar activation if cooperative. | Median neuropathy may occur with dislocation; persistent or delayed symptoms require urgent reassessment. |
| Anterior interosseous nerve | Ask for the OK sign: thumb IP flexion and index DIP flexion. | AIN deficit is a motor median-nerve branch problem; document separately from sensation. |
| Ulnar nerve | Small-finger sensation, finger abduction, crossing fingers or first dorsal interosseous activation. | At risk with medial epicondyle avulsion, fixation and dislocation. |
| Posterior interosseous nerve | Finger MCP extension and thumb extension with wrist supported. | PIN palsy can accompany radial neck injury or be iatrogenic during percutaneous/open procedures. |
Differential diagnosis
The painful, swollen paediatric elbow has several overlapping causes. The job is to separate them with a systematic radiograph read rather than a single glance, because the management differs sharply.
Differentiating the Painful Paediatric Elbow
| Diagnosis | Discriminating Features | How to Confirm | Why It Matters |
|---|---|---|---|
| Radial neck fracture | Lateral elbow tenderness, painful or blocked forearm rotation, valgus mechanism. | AP/lateral plus a view at maximum deformity; measure angulation and translation. | Drives the closed-percutaneous-open reduction ladder. |
| Olecranon fracture | Posterior swelling and tenderness, possible loss of active extension. | True lateral showing the trochlear notch; CT if articular surface unclear. | Articular step or extensor failure mandates fixation. |
| Simple elbow dislocation | Gross deformity, fixed posture, rapid relief after reduction. | Pre- and post-reduction AP/lateral confirming congruity. | Stable reductions mobilise early; instability needs more. |
| Medial epicondyle avulsion or entrapment | Medial tenderness, ulnar symptoms, absent medial epicondyle for age. | Confirm the epicondyle is in position using CRITOE; CT or comparison films if doubtful. | An incarcerated fragment is an absolute operative indication. |
| Monteggia variant | Ulna deformity or plastic bowing with a malaligned radiocapitellar line. | Image the whole forearm; trace the radiocapitellar line on every view. | Restoring the ulna, not the radial head alone, is the key step. |
| Supracondylar fracture | Distal humeral tenderness, gross swelling, high neurovascular risk. | AP/lateral assessing the anterior humeral line. | A different pathway; AIN and brachial artery are the priority. |
| Lateral condyle fracture | Lateral tenderness, subtle metaphyseal fleck, late displacement risk. | Internal-oblique view; consider CT or short-interval films. | Articular fracture prone to non-union if displacement is missed. |
| Pulled elbow (radial head subluxation) | Toddler, axial-traction history, arm held pronated, no swelling, normal films. | Clinical diagnosis; films are normal. | Treated by simple reduction manoeuvre, never surgery. |
Investigations
What to request
Order imaging that answers the surgeon's questions, not just "elbow X-ray":
- AP and true lateral elbow radiographs: mandatory first-line views.
- Radiocapitellar or oblique view: helpful if radial neck alignment or capitellum relationship is unclear.
- Forearm AP and lateral including wrist and elbow: request when there is ulna pain, deformity, plastic bowing or any concern for Monteggia variant.
- Post-reduction AP and lateral radiographs: mandatory after elbow dislocation reduction.
- Comparison elbow radiographs: useful when ossification centres make medial epicondyle or trochlear interpretation difficult.
- CT: use for complex fracture-dislocation, articular olecranon fracture planning, incarcerated fragment uncertainty or surgical planning.
- MRI or ultrasound for nerve entrapment: not routine, but useful when neurological symptoms persist or median nerve entrapment is suspected.
How to read the films
Radiographic Decision Points
| Feature | How To Assess | Treatment Meaning |
|---|---|---|
| Radiocapitellar line | Draw down the centre of the radial shaft and neck on AP and lateral views; it should pass through the capitellum. | Failure suggests radial head dislocation, Monteggia pattern or inadequate reduction. |
| Radial neck angulation | Measure the angle between the radial shaft axis and the radial head/neck axis on the view showing maximum deformity. | Less displaced injuries may be immobilised; increasing angulation or blocked rotation pushes toward reduction. |
| Radial neck translation | Assess percentage displacement and head-neck contact. | Translation plus angulation predicts reduction difficulty and may require percutaneous or intramedullary assistance. |
| Olecranon articular step | Inspect the greater sigmoid notch on true lateral and AP; CT if the joint line is unclear. | Displaced intra-articular fractures need anatomical reduction. |
| Medial epicondyle | After dislocation, confirm the medial epicondyle is visible in its normal position for age. | Absent or intra-articular fragment suggests entrapment and operative extraction/fixation. |
| Ulna alignment | Look for proximal ulna fracture, plastic deformation or bowing; image the forearm if uncertain. | Monteggia variants need restoration of ulna alignment and radiocapitellar reduction. |
CRITOE trap
If the child is old enough for the medial epicondyle to be visible and it is missing after a dislocation, search the joint. A trapped medial epicondyle can mimic another ossification centre and should not be dismissed as normal development.
Treatment Thresholds
Radial Neck: Practical Treatment Groups
| Pattern | Typical Features | Treatment Direction |
|---|---|---|
| Acceptable alignment | Low angulation, minimal translation, painless or acceptable rotation and no associated instability. | Above-elbow immobilisation, early review and motion when safe. |
| Moderate displacement | About 30-60 degrees angulation, translation or blocked rotation. | Closed reduction first; accept reduction only if motion and alignment are satisfactory. |
| Severe or failed closed reduction | Marked angulation, major translation, mechanical block or unsuccessful closed manoeuvre. | Percutaneous leverage, joystick technique or intramedullary reduction/fixation. |
| Irreducible fracture | Soft-tissue interposition, complete displacement, delayed presentation or failed minimally invasive methods. | Open reduction only when required; preserve soft tissues and warn about stiffness/AVN/synostosis. |
Management
Immediate Priorities
| Priority | Action | Reason |
|---|---|---|
| Analgesia and splint | Provide pain control and protect the limb. | A calm, supported child is easier and safer to assess. |
| Threatened limb | Escalate open injury, threatened skin, vascular compromise or compartment concern. | These override routine fracture pathways. |
| Nerve baseline | Document median, ulnar and posterior interosseous nerve function before reduction. | New deficit after manipulation must be recognised. |
| Reduction | Reduce a dislocated elbow promptly if there is no contraindication. | A congruent joint protects soft tissues and nerves. |
| Post-reduction check | Repeat neurovascular examination and AP/lateral radiographs. | Find medial epicondyle entrapment, radial neck injury, olecranon injury and radiocapitellar incongruity. |
Operative Technique
Radial neck reduction ladder
The principle is to reduce the radial neck with the least soft-tissue stripping that gives a stable, congruent, mobile elbow.
Radial Neck: Technique Ladder
| Step | Technique | Technical Points |
|---|---|---|
| Closed reduction | Traction, varus/valgus correction as appropriate, forearm rotation, and direct pressure over the radial head/neck under image intensifier. | Do not repeatedly force the fracture. Recheck rotation and radiocapitellar alignment. |
| Percutaneous leverage | Use a small K-wire or elevator as a joystick/leverage tool under fluoroscopy. | Stay aware of the posterior interosseous nerve; use controlled passes and avoid multiple blind attempts. |
| Intramedullary reduction/fixation | A prebent elastic nail is passed from the distal radius region and rotated to elevate and reduce the radial head fragment. | Useful for displaced fractures when closed reduction is inadequate; confirm head-neck alignment and avoid physeal injury. |
| Open reduction | Lateral approach only when closed/percutaneous methods fail or the fracture is irreducible. | Preserve periosteum and soft tissue; warn about stiffness, avascular necrosis and synostosis. |
Olecranon fixation
Use a posterior approach centred on the olecranon. The operation is directed by the fracture pattern:
- Simple transverse displaced fracture: reduce articular surface anatomically; fixation may be suture tension band, wire tension band, intramedullary screw or combined construct depending size and maturity.
- Comminuted or oblique pattern: plate fixation may provide better control than tension band alone.
- Skeletally immature child: minimise physeal/apophyseal injury and choose fixation that avoids unnecessary hardware prominence.
- Associated instability: confirm radiocapitellar congruity and ulna alignment after fixation.
Key steps:
- Position supine or lateral with image intensifier access.
- Mark olecranon, proximal ulna, medial epicondyle and ulnar nerve course.
- Posterior incision; protect skin flaps and avoid unnecessary ulnar nerve handling unless the approach extends medially.
- Clear fracture haematoma without stripping soft tissue unnecessarily.
- Reduce the articular surface and confirm on AP/lateral fluoroscopy.
- Choose fixation based on pattern: suture tension band, wire tension band, screw, plate or hybrid.
- Test elbow motion and radiocapitellar alignment before closure.
- Immobilise initially, then start motion when fixation and soft tissues allow.
Elbow dislocation with incarcerated medial epicondyle
This is a surgical problem because the fragment blocks joint restoration and carries the medial collateral ligament attachment.
- Position supine with the arm on a hand table.
- Mark the medial epicondyle, olecranon and ulnar nerve.
- Use a medial approach centred over the medial epicondyle.
- Identify and protect the ulnar nerve; transpose only if needed for exposure, instability or nerve symptoms.
- Open the joint enough to extract the incarcerated fragment.
- Reduce the medial epicondyle to its origin and fix with screw, K-wire or suture construct according to fragment size and skeletal maturity.
- Confirm ulnohumeral and radiocapitellar congruity on AP and lateral images.
- Check elbow stability through a safe arc.
- Repeat and document median, ulnar and posterior interosseous nerve function post-operatively.
Post-Operative Care and Rehabilitation
The elbow becomes stiff quickly, but unstable fixation or an unrecognised associated injury is worse than a short period of protection. Rehabilitation therefore depends on the stability achieved.
Aftercare Priorities
| Situation | Immobilisation | Follow-up Focus |
|---|---|---|
| Non-operative radial neck or olecranon | Above-elbow cast or splint initially. | Repeat radiographs, pain, rotation, extension and nerve function. |
| Radial neck reduction/fixation | Splint or cast until early healing; avoid prolonged immobilisation if stable. | Radiocapitellar alignment, forearm rotation, PIN function and stiffness. |
| Olecranon fixation | Protect fixation, then progressive motion. | Union, hardware symptoms, extension strength and articular congruity. |
| Elbow dislocation | Brief protection if stable; longer protection if complex. | Stability, medial epicondyle healing, ulnar nerve symptoms and range of motion. |
Parents should understand that the goal is not simply bone healing. The child also needs a congruent elbow, recovering motion, intact nerve function and no missed associated injury.
Complications and Failure Management
Complications by Injury
| Complication | Where It Occurs | Prevention and Management |
|---|---|---|
| Stiffness | All paediatric elbow trauma, especially delayed or open radial neck reduction. | Avoid unnecessary prolonged immobilisation; start supervised motion when stable; treat established stiffness with therapy and selective surgery. |
| Loss of pronation/supination | Radial neck malunion, radioulnar synostosis or over-manipulation. | Restore radial neck alignment, avoid repeated soft-tissue trauma, monitor rotation early. |
| Avascular necrosis of radial head | Severe radial neck displacement or open reduction. | Preserve periosteal blood supply; reserve open reduction for irreducible cases. |
| Radioulnar synostosis | Severe proximal radius injury or open surgery. | Limit soft-tissue stripping and repeated attempts; manage established synostosis only when mature and functionally limiting. |
| Missed medial epicondyle entrapment | Post-reduction elbow dislocation. | Always find the medial epicondyle; CT or comparison films if uncertain; open extraction/fixation if incarcerated. |
| Ulnar nerve symptoms | Medial epicondyle injury or fixation. | Document before surgery, protect during approach, reassess after fixation. |
| Posterior interosseous nerve palsy | Radial neck injury or percutaneous/open reduction. | Pre/post documentation, careful trajectory, observation for neurapraxia unless progressive or iatrogenic concern. |
| Hardware prominence | Olecranon tension band or wires. | Choose fixation carefully; remove symptomatic hardware after union when needed. |
Controversies and Areas of Uncertainty
Much of paediatric elbow trauma rests on retrospective series rather than randomised trials, so honest examiners reward candidates who can state where the evidence is genuinely unsettled.
Where Surgeons Still Disagree
| Question | Arguments For | Arguments Against | Practical Position |
|---|---|---|---|
| Acceptable radial neck angulation before reduction | Younger children remodel; thresholds near 30 degrees are widely quoted. | Remodelling is unreliable for translation and rotation; older children remodel poorly. | Treat the rotation block and the child's age, not a single angle in isolation. |
| Fix the displaced medial epicondyle? | Higher union odds with fixation; helps high-demand athletes and unstable elbows. | Similar pain and function in retrospective series; non-union is often asymptomatic. | Fix incarcerated or open fractures; individualise the rest while the SCIENCE trial reports. |
| Tension-band wire versus suture for olecranon | Wire is familiar and strong; suture avoids prominent metal and removal. | Wire carries higher hardware-symptom and removal rates. | Match the construct to pattern and maturity; suture is a legitimate option. |
| When to suspect an occult Monteggia | Missing it leads to chronic radial head dislocation and PIN palsy. | Over-imaging every forearm is low yield. | Trace the radiocapitellar line on every elbow film and image the forearm if the ulna looks bowed. |
| Routine implant removal | Removes prominent or symptomatic hardware in active children. | A second anaesthetic and surgical risk for asymptomatic implants. | Remove for symptoms or planned protocols, not reflexively. |
Guidelines, Registries & Global Practice
Paediatric elbow trauma is managed worldwide, and the broad principles are consistent across societies even though the supporting evidence is mostly low level. There is no implant registry for paediatric elbow fractures comparable to adult arthroplasty registries, so practice is guided by society statements, trauma networks and large series.
Global epidemiology
- Elbow fractures are among the most common paediatric fractures, with supracondylar fractures the largest group; radial neck fractures comprise roughly 5-10% of paediatric elbow fractures and about 1% of all paediatric fractures.
- Medial epicondyle fractures have an estimated incidence near 40-60 per 100,000 per year and are associated with elbow dislocation in about 60% of cases.
- Median nerve injury complicates approximately 3% of paediatric elbow dislocations, linked to medial epicondyle avulsion.
Side-by-side guidance
Society and Network Positions
| Body | Emphasis | Practical Point |
|---|---|---|
| AAOS / POSNA (US) | Least-invasive reduction first for radial neck; individualised medial epicondyle care. | Open radial neck reduction is reserved for failed closed and percutaneous methods. |
| BOA / BSCOS (UK) | Standardised paediatric trauma pathways; prioritised the medial epicondyle question (SCIENCE trial). | Displaced medial epicondyle management is treated as an evidence gap, not a fixed rule. |
| AO Foundation | Pattern-based fixation principles and the least-invasive construct that restores stability. | Choose tension band, screw or plate by fracture pattern and maturity. |
| EFORT / European consensus | Recognition of associated injuries (Monteggia, medial epicondyle) and early motion. | Always trace the radiocapitellar line and avoid prolonged immobilisation. |
High- versus limited-resource practice
Resource-Setting Variation
| Setting | Typical Reality | Adaptation |
|---|---|---|
| High-resource | Fluoroscopy, CT, flexible nails and early specialist review available. | Use the full reduction ladder and image-guided percutaneous techniques. |
| Limited-resource | Variable fluoroscopy, delayed presentation, limited implants. | Prioritise safe closed reduction, K-wire constructs and reliable follow-up; refer complex fracture-dislocations early. |
| Delayed presentation (any setting) | More common where access is limited; chronic Monteggia or stiff radial neck malunion. | Plan reconstruction (ulnar osteotomy, annular ligament reconstruction) at a capable centre. |
Evidence Signals
Paediatric olecranon fixation: suture vs wire tension band
Key Findings:
- Nine studies were pooled, with three directly comparing tension-band suturing (TBS) with tension-band wiring (TBW).
- No statistically significant differences in pain, non-union, revision fixation or extension loss.
- TBS demonstrated fewer hardware-related complications than TBW.
Clinical Implication: Suture tension band is a legitimate option in selected paediatric olecranon fractures; fixation choice should match fracture pattern, skeletal maturity and hardware prominence risk.
Limitation: Only three studies offered direct comparison; cohorts were small and largely retrospective, so further high-quality studies are needed.
Source: Zouhbi et al., Orthopedics, 2025
Metaizeau closed intramedullary pinning technique
Key Findings:
- Radial neck fractures account for about 1% of all paediatric fractures and 5-10% of paediatric elbow fractures.
- A retrograde nail is rotated 180 degrees to reduce the radial head while preserving the tenuous periosteal blood supply; the forearm is pronated during insertion to protect the posterior interosseous nerve.
- Across cited series, good or excellent Mayo Elbow Performance Scores were reported in roughly 80-100% of selected cases.
Clinical Implication: Closed intramedullary (Metaizeau) reduction is the preferred operative escalation before open reduction, which carries a high osteonecrosis rate.
Limitation: A technique article synthesising heterogeneous case series rather than a single comparative trial.
Source: Kozin & Soldado, JBJS Essential Surgical Techniques, 2024
Percutaneous leverage technique
Key Findings:
- A modified percutaneous leverage technique (Wallace technique) plus flexible intramedullary fixation reduced eight displaced paediatric radial neck fractures at a single Level I centre.
- The technique is minimally invasive compared with open reduction and permits early elbow mobilisation.
- No patient in the series developed synostosis or sustained a peripheral nerve injury.
Clinical Implication: Percutaneous reduction can avoid the soft-tissue stripping associated with open reduction.
Limitation: Level IV evidence in only eight fractures; technique success depends on fracture pattern and surgeon experience.
Source: Watkins et al., Journal of Children's Orthopaedics, 2020
Surgical radial neck series: predictors of poor outcome
Key Findings:
- 151 surgically treated children; mean angulation improved from 43 to 13 degrees and displacement from 37% to under 1%.
- Among 131 with follow-up, 31% had an unsuccessful outcome; age 10 years or more, greater displacement and open reduction were independent predictors of failure.
- Closed manipulation was predicted to fail in about half of fractures angulated 36 degrees or more, and about half displaced 65% or more needed open reduction.
Clinical Implication: Less invasive reduction methods should precede open reduction; older age and severe displacement flag a higher risk of a poor result.
Limitation: Retrospective single-institution surgical cohort without a non-operative comparator.
Source: Zimmerman et al., JBJS American Volume, 2013
Clinical Scenarios
Use these scenarios to practise clinical reasoning and management decisions
CLINICAL SCENARIOChallenging
CLINICAL PROMPT
"A 9-year-old has a radial neck fracture with about 45 degrees angulation and painful blocked rotation. The hand is perfused and PIN function is normal."
PRACTICAL APPROACH
I would treat this as a displaced paediatric radial neck fracture with mechanical limitation. I would document median, ulnar and posterior interosseous nerve function, obtain true AP and lateral elbow radiographs with a view showing maximum deformity, and search for elbow dislocation or Monteggia variant. With about 45 degrees angulation and blocked rotation, I would attempt closed reduction under image intensifier. If the reduction is satisfactory and rotation improves, I would immobilise and review early. If closed reduction fails, I would escalate to percutaneous leverage or intramedullary reduction/fixation. Open reduction is a last resort because it increases soft-tissue stripping and risks stiffness, avascular necrosis and synostosis.
KEY CLINICAL POINTS
Blocked rotation is a treatment-changing clinical feature
PIN function must be documented before and after manipulation
Closed reduction comes before percutaneous or open techniques
Open reduction is reserved for irreducible fractures
COMMON PITFALLS
Ignoring associated Monteggia injury
Opening the fracture too early
Failing to document PIN function
FURTHER QUESTIONS
"What percutaneous options can you use if closed reduction fails?"
CLINICAL SCENARIOCritical
CLINICAL PROMPT
"A 12-year-old elbow dislocation is reduced in the emergency department. Post-reduction films show a congruent joint, but the medial epicondyle cannot be seen in its normal position."
PRACTICAL APPROACH
The concern is medial epicondyle incarceration in the joint. In a child this age the medial epicondyle should usually be visible, and after dislocation the medial collateral ligament can avulse the apophysis. During reduction it may become trapped in the ulnohumeral joint. I would repeat a careful clinical and nerve assessment, especially ulnar and median nerve function, review the radiographs with CRITOE in mind and obtain comparison films or CT if uncertain. If the fragment is incarcerated, treatment is open extraction and fixation of the medial epicondyle with ulnar nerve protection.
KEY CLINICAL POINTS
Missing medial epicondyle after dislocation is not benign
CRITOE prevents misreading the fragment as a normal ossification centre
Incarcerated fragment needs open extraction
Ulnar nerve protection is central to surgery
COMMON PITFALLS
Calling it a simple reduced dislocation
Mistaking the trapped medial epicondyle for the trochlea
Not checking ulnar nerve function
FURTHER QUESTIONS
"Describe the medial approach for extraction and fixation."
CLINICAL SCENARIOStandard
CLINICAL PROMPT
"A child has an undisplaced olecranon fracture and can actively extend the elbow. The radiocapitellar line is normal."
PRACTICAL APPROACH
This is suitable for non-operative care if the articular surface is undisplaced, the extensor mechanism is intact, the elbow is stable and there is no associated Monteggia pattern. I would immobilise in an above-elbow splint or cast, arrange early follow-up radiographs to ensure it remains undisplaced, monitor pain and nerve function, and begin protected motion when healing and stability allow. I would counsel that displacement, loss of active extension, articular incongruity or radiocapitellar malalignment would change the plan toward operative fixation.
KEY CLINICAL POINTS
Extensor mechanism function matters
Radiocapitellar line excludes obvious Monteggia association
Repeat radiographs are needed
Displacement or articular step changes treatment
COMMON PITFALLS
Treating every olecranon fracture operatively
Missing a Monteggia variant
Immobilising too long without a motion plan
FURTHER QUESTIONS
"What fixation options would you consider if the fracture displaced?"
Paediatric Elbow Injury Cluster: Final Checklist
Clinical summary
Assessment
- •Document skin, perfusion and median, ulnar and posterior interosseous nerve function.
- •Order true AP and lateral elbow radiographs; add forearm views if Monteggia is possible.
- •After dislocation reduction, find the medial epicondyle and recheck post-reduction films.
Treatment decisions
- •Radial neck treatment depends on angulation, translation, rotation block, age and associated injury.
- •Use the radial neck reduction ladder: closed, percutaneous leverage, intramedullary reduction, open only if needed.
- •Olecranon treatment depends on displacement, articular congruity, extensor mechanism and proximal ulna alignment.
Do not miss
- •Simple stable elbow dislocations need early protected motion; complex patterns need fixation or stabilisation.
- •Warn about stiffness, loss of rotation, AVN, synostosis, nerve injury, hardware prominence and missed associated injury.
- •A missing medial epicondyle or abnormal radiocapitellar line after reduction changes the diagnosis.