S79.131A Salter-Harris Type III physeal fracture of lower end of right femur, initial encounter for closed fracture

Name of the Condition

Salter-Harris Type III physeal fracture of lower end of right femur, initial encounter for closed fracture

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 joint surface, potentially affecting the articular cartilage. The term "initial encounter" indicates this is the first presentation for treatment, and "closed fracture" means the overlying skin is intact.

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 extend into 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 at the knee or thigh, often worsening with movement.
• Limited range of motion in the affected leg.
• Visible deformity or misalignment in severe cases.
• Difficulty bearing weight on the injured limb.
• Tenderness to touch over the fracture site.

Diagnosis

Diagnosis involves a physical examination to assess pain, swelling, and range of motion. Imaging studies, such as X-rays or MRI, are typically used to confirm the fracture type and extent. The Salter-Harris classification system helps identify the specific fracture pattern, and the "closed fracture" status is determined by examining the skin for breaks or open wounds. Documentation should specify the side (right) and the initial encounter context.

Treatment Options

Treatment depends on the fracture's severity and displacement. Non-displaced fractures may be managed with immobilization (e.g., casting or bracing) and activity restriction. Displaced fractures often require surgical intervention to realign the bone and stabilize the joint. Physical therapy may be recommended during recovery to restore strength and mobility. Follow-up imaging ensures proper healing.

Prognosis and Follow-Up

Prognosis is generally favorable with appropriate treatment, though outcomes depend on the fracture's severity and alignment. Long-term follow-up may be needed to monitor for growth disturbances or joint issues. Regular check-ups with an orthopedic specialist help assess healing and functional recovery.

Complications

• Growth plate damage leading to limb length discrepancy or angular deformity.
• Joint stiffness or reduced range of motion.
• Early-onset arthritis due to articular cartilage injury.
• Nonunion or malunion of the fracture.
• Infection (rare, but possible with surgical intervention).

Lifestyle & Prevention

• Use protective gear during high-impact sports (e.g., knee pads, helmets).
• Ensure proper warm-up and technique to reduce injury risk.
• Maintain bone health with adequate nutrition (e.g., calcium, vitamin D).
• Avoid overuse or repetitive stress on growing bones.
• Supervise children during activities with fall risks.

When to Seek Professional Help

Seek immediate medical attention if there is severe pain, inability to bear weight, visible deformity, or signs of infection (e.g., fever, redness, drainage). Prompt evaluation is critical to prevent complications and ensure proper treatment.

Tips for Medical Coders

Document the fracture type (Salter-Harris Type III), location (lower end of right femur), encounter status (initial), and fracture status (closed) to support accurate coding. Ensure clinical documentation specifies the side (right) and absence of open wounds to confirm the "closed fracture" designation. Verify that the injury involves the growth plate and epiphysis, as this defines the Type III classification.