What is the appropriate management for a Salter‑Harris type II fracture of the proximal phalanx in a pediatric patient?

Management of Salter-Harris Type II Fracture of the Proximal Phalanx

For a Salter-Harris type II fracture of the proximal phalanx in a pediatric patient, nondisplaced fractures should be managed with splint immobilization and close monitoring, while displaced or unstable fractures require closed reduction and percutaneous pinning. 1

Initial Assessment and Imaging

• Obtain plain radiographs of the hand and digits in three views to confirm the diagnosis and assess displacement 1
• Perform a thorough physical examination specifically assessing the digital cascade for rotational deformity and coronal malalignment, as these indicate instability requiring operative management 1
• Salter-Harris type II fractures are the most common pediatric finger fracture, occurring through the growth plate and metaphysis, with a metaphyseal fragment (Thurston-Holland sign) 1, 2

Treatment Algorithm Based on Fracture Stability

Nondisplaced Fractures

• Manage with splint immobilization alone 1
• The splint must allow full finger range of motion, and patients should begin active finger motion exercises immediately to prevent stiffness 3
• Immobilization typically continues for 3-4 weeks 3, 4

Displaced but Reducible Fractures

• Attempt closed reduction in the emergency department 1
• If reduction is stable, immobilize with a splint and monitor closely to ensure maintenance of reduction 1
• Critical caveat: These fractures require frequent radiographic follow-up because loss of reduction is common and necessitates operative intervention 1

Unstable or Irreducible Fractures

• Proceed directly to closed reduction and percutaneous Kirschner wire fixation 1, 5
• Juxtaepiphyseal fractures (occurring 1-2 mm distal to the growth plate) present with significantly more angulation and require operative fixation in 42.9% of cases versus only 10.8% for true Salter-Harris type II fractures 5
• Distinguish between these patterns carefully, as juxtaepiphyseal fractures are more clinically unstable despite similar radiographic appearance 5

Follow-Up and Monitoring

• Obtain radiographic follow-up at 3-4 weeks to assess healing progress and ensure no displacement has occurred 6
• Monitor for signs of growth arrest, though Salter-Harris type II fractures generally have excellent prognosis with minimal risk of growth disturbance 2
• Most phalangeal physeal fractures heal without permanent deformity when appropriately managed 1, 2

Age-Specific Considerations

Infants and Young Children (< 12 months)

• Any child younger than 12 months with a fracture requires a complete skeletal survey to evaluate for non-accidental trauma, regardless of fracture type or reported mechanism 7
• The combination of age < 12 months, presence of a fracture, and delayed presentation meets the threshold for mandatory reporting to child protective services 7
• This represents reasonable suspicion—not definitive proof—which is sufficient legal grounds for reporting 7

Toddlers and Older Children (≥ 12 months)

• Skeletal survey is not indicated for phalangeal fractures with a history consistent with accidental trauma 3
• However, if the history is inconsistent with the injury mechanism or there are other concerning features (e.g., delayed presentation, multiple injuries), consider skeletal survey and mandatory reporting 7, 3
• Children aged 10-14 years have the highest incidence of phalangeal fractures, typically from contact sports 1

Common Pitfalls to Avoid

• Do not accept any rotational malalignment: Even minor rotation causes significant functional impairment and requires operative correction 1
• Do not mistake juxtaepiphyseal fractures for Salter-Harris type II fractures: The former are more unstable and require operative management more frequently 5
• Do not delay reporting suspected abuse: Failure to report can lead to additional morbidity and mortality from ongoing abuse 7
• Ensure the splint is not overtightened, as this can compromise circulation, particularly in young children 6