S79.131 Salter-Harris Type III physeal fracture of lower end of right femur

Name of the Condition

Salter-Harris Type III physeal fracture of lower end of right femur

Summary

A Salter-Harris Type III physeal fracture of the lower end of the right femur is an injury involving the growth plate (physis) at the distal femur, typically occurring in children or adolescents. This fracture disrupts the physis and extends through the epiphysis, as defined by the Salter-Harris classification system. The injury involves a fracture line that passes through the growth plate and into the articular surface of the epiphysis, potentially affecting joint alignment and stability.

Causes

Salter-Harris Type III physeal fractures of the lower femur are usually caused by acute trauma, such as falls, sports-related injuries, or direct blows to the knee or thigh. The force transmitted across the growth plate can cause it to separate and fracture the epiphysis. In some cases, repetitive stress or overuse may contribute to the injury, particularly in active children or adolescents.

Risk Factors

• Age: Most common in children and adolescents, as growth plates are weaker than surrounding bone.
• Activity level: Participation in high-impact sports or activities with a risk of falls (e.g., gymnastics, soccer, skateboarding).
• Growth spurts: Periods of rapid growth may temporarily weaken the physis, increasing susceptibility to injury.
• Anatomical factors: Variations in bone structure or prior injuries may predispose individuals to physeal fractures.

Symptoms

• Pain and swelling localized to the knee or thigh
• Difficulty bearing weight or walking
• Visible deformity or misalignment of the knee
• Limited range of motion in the affected joint
• Tenderness to palpation over the distal femur

Diagnosis

Diagnosis involves a thorough clinical evaluation, including a detailed history of the injury and physical examination. Imaging studies, such as X-rays or MRI, are typically used to confirm the fracture type and assess the extent of damage to the growth plate and epiphysis. The Salter-Harris classification system helps guide treatment by identifying the specific fracture pattern.

Treatment Options

Treatment depends on the severity and displacement of the fracture. Nondisplaced fractures may be managed with immobilization using a cast or brace. Displaced fractures often require surgical intervention to realign the bone fragments and stabilize the joint. Postoperative care includes physical therapy to restore function and monitor for complications.

Prognosis and Follow-Up

Prognosis varies based on the accuracy of reduction and the extent of growth plate involvement. Close follow-up with imaging is essential to monitor for growth disturbances or joint deformities. Long-term outcomes depend on the severity of the injury and adherence to treatment recommendations.

Complications

• Growth plate arrest leading to limb length discrepancy
• Premature closure of the physis
• Joint stiffness or arthritis
• Malunion or nonunion of the fracture
• Neurovascular injury (rare)

Lifestyle & Prevention

• Use appropriate protective gear during sports or high-risk activities.
• Ensure proper warm-up and conditioning to reduce injury risk.
• Maintain a healthy diet rich in calcium and vitamin D to support bone health.
• Avoid overuse or repetitive stress on the knee joint in children.

When to Seek Professional Help

Seek immediate medical attention if there is severe pain, inability to bear weight, visible deformity, or signs of neurovascular compromise (e.g., numbness, coldness, or discoloration of the leg). Prompt evaluation is critical to prevent long-term complications.

Tips for Medical Coders

Document the specific Salter-Harris Type III classification and the involvement of the right femur. Include details about fracture displacement, treatment provided, and any associated injuries to ensure accurate coding. Verify that the documentation supports the diagnosis and aligns with the clinical findings.