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Pediatric Medial Humeral Condyle Fractures: Classification, Treatment, and Outcomes
Kevin J Orellana1, Soroush Baghdadi1,2,3, Eliza Buttrick1
1Division of Orthopaedic Surgery, The Children's Hospital of Philadelphia.
Insights
A new classification system for pediatric medial humeral condyle fractures shows good reliability. Type 1A fractures can be treated nonoperatively, while other types require surgery, with skeletally mature children at higher risk for motion loss.
Area of Science:
- Orthopaedic Surgery
- Pediatric Orthopaedics
- Traumatology
Background:
- Medial humeral condyle fractures are common in children.
- Existing classification systems lack comprehensive descriptions and treatment guidelines.
- A standardized system is needed for accurate diagnosis and management.
Purpose of the Study:
- To develop and validate a novel classification system for pediatric medial humeral condyle fractures.
- To establish treatment guidelines based on the proposed classification.
- To improve diagnostic accuracy and patient outcomes.
Main Methods:
- A retrospective review of 27 pediatric patients (2012-2022) with medial humeral condyle fractures.
- Development of a classification system based on fracture pattern (valgus/avulsion vs. vertical shear) and displacement.
- Assessment of intrarater and inter-rater reliability using Kappa statistics.
Main Results:
- The classification system demonstrated substantial inter-rater (ĸ=0.62) and intrarater (mean ĸ=0.79) reliability.
- Type 1A fractures (valgus/avulsion, non-displaced) were treated nonoperatively.
- Types 1B and 2B fractures (displaced or vertical shear) predominantly required surgical intervention (ORIF or CRPP).
- Skeletally mature children had an increased risk of functional loss of motion (P=0.02).
Conclusions:
- The proposed classification system for pediatric medial humeral condyle fractures is reliable and clinically useful.
- Type 1A fractures are suitable for nonoperative management.
- Surgical intervention is recommended for types 1B and 2B fractures.
- Skeletally mature pediatric patients require careful monitoring for potential motion loss.
Background:
The purpose of this study was to develop and validate a classification system that describes the injury pattern of pediatric medial humeral condyle fractures and provide treatment guidelines.
Methods:
Patients less than 18 years old with medial humeral condyle fractures from 2012 to 2022 were identified. A classification system was developed based on fracture pattern and putative mechanism of injury. Type 1 fractures were characterized by a valgus/avulsion type injury while type 2 fractures were characterized by a vertical shear pattern. Each type was subdivided by amount of fragment displacement: (A) nondisplaced or minimally displaced (<2 mm) versus (B) displaced (>2 mm). Three attending orthopaedic surgeons evaluated and classified each patient's fracture. Intrarater and inter-rater reliability was calculated with Kappa statistics.
Results:
Twenty-seven patients (16 males) with an mean age of 10.5 years were included. There were 4 type 1A, 17 type 1B, and 6 type 2B fractures with substantial agreement in inter-rater (ĸ=0.62, CI=0.45-0.78), and intrarater (mean ĸ=0.79, range=0.70-0.93) reliability analysis. Surgical treatment was performed in 25/27 patients; 4 patients underwent closed reduction percutaneous pinning (CRPP) and 21 underwent open reduction and internal fixation (ORIF). Ten patients required advanced imaging to assist in surgical decision making. Both nonoperative patients had type 1A fractures. Nearly one-fourth of patients (6/27, 22%) had some functional loss of motion and poor outcomes based on Flynn's criteria, with a Fisher exact test revealing an increased risk of functional loss of motion in skeletally mature children ( P =0.02). Two patients had complications including 1 nonunion after initial nonoperative management (type 1B) and 1 patient (type 2B) required manipulation under anesthesia for postoperative stiffness.
Conclusion:
Moderate to strong inter-rater and intrarater reliability was demonstrated with the proposed classification system. Type 1A fractures are amenable to nonoperative treatment while types 1B and 2B require surgical management. Skeletally mature patients may be at greater risk of motion loss following injury.
Level Of Evidence:
Level IV-case series.
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