Factors Affecting Lateral Overgrowth in Operatively Treated Lateral Condyle Fractures in Children

Area of Science:

• Orthopedic surgery
• Pediatric orthopedics
• Radiology

Background:

• Lateral condyle overgrowth (LCO) is a common complication of pediatric lateral condyle fractures.
• Understanding factors influencing LCO is crucial for optimizing treatment outcomes.

Purpose of the Study:

• To investigate the relationship between LCO and patient age, fracture reduction quality, fixation method, and initial displacement.
• To identify key predictors of LCO in operatively treated pediatric lateral condyle fractures.

Main Methods:

• Retrospective analysis of 201 operatively treated pediatric lateral condyle fractures.
• Quantification of LCO using percent change in interepicondylar width (IEW) from AP radiographs.
• Classification of fractures using the Song system and reduction quality (anatomic vs. nonanatomic).

Main Results:

• A significant independent association was found between LCO and age, race, and reduction quality.
• Increasing age showed an inverse relationship with LCO.
• Black and Asian patients exhibited greater LCO compared to White patients; nonanatomic reductions led to increased LCO.

Conclusions:

• Nonanatomic reduction, younger age, and Black or Asian race are significant predictors of LCO.
• The type of hardware used and initial fracture displacement did not correlate with LCO.
• This study represents the largest investigation into LCO in surgically managed pediatric lateral condyle fractures.