S79.141 Salter-Harris Type IV physeal fracture of lower end of right femur

Name of the Condition

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

Summary

A Salter-Harris Type IV 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 involves a fracture through the metaphysis, physis, and epiphysis, as defined by the Salter-Harris classification system. The injury may result in displacement of bone fragments and potential damage to the growth plate, which is critical for longitudinal bone growth.

Causes

Salter-Harris Type IV 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 through multiple bone regions. 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, particularly over the distal femur.
• Limited range of motion in the knee joint.
• Visible deformity or misalignment of the leg.
• Difficulty bearing weight on the affected limb.
• Possible numbness or tingling if nearby nerves are involved.

Diagnosis

Diagnosis is typically made through a combination of clinical evaluation and imaging studies. A physical examination assesses pain, swelling, and range of motion. Imaging, such as X-rays or MRI, is used to visualize the fracture pattern and confirm the Salter-Harris Type IV classification. The right femur is specifically noted to indicate the affected side.

Treatment Options

Treatment depends on the severity and displacement of the fracture. Non-displaced fractures may be managed with immobilization, such as a cast or brace, and activity restriction. Displaced fractures often require surgical intervention to realign and stabilize the bone fragments, using pins, screws, or plates. Physical therapy may be recommended during recovery to restore strength and mobility.

Prognosis and Follow-Up

Prognosis varies based on the extent of the injury and treatment. Early intervention and proper alignment generally improve outcomes. Regular follow-up with imaging is necessary to monitor for growth plate damage or complications. Long-term follow-up may be required to assess for limb length discrepancies or angular deformities.

Complications

• Growth plate damage leading to limb length discrepancy or angular deformity.
• Nonunion or malunion of the fracture.
• Infection, particularly with surgical intervention.
• Joint stiffness or chronic pain.
• Nerve or vascular injury in severe cases.

Lifestyle & Prevention

• Use appropriate protective gear during sports or high-risk activities.
• Ensure proper warm-up and technique 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 and thigh.

When to Seek Professional Help

Seek immediate medical attention if there is severe pain, visible deformity, inability to bear weight, or signs of nerve or vascular compromise (e.g., numbness, coldness, discoloration). Prompt evaluation is critical to prevent complications and ensure proper treatment.

Tips for Medical Coders

When coding for S79.141, ensure the documentation specifies the Salter-Harris Type IV classification, the location (lower end of femur), and the side (right). The code requires clear clinical correlation to confirm the fracture type and anatomical details. Verify that the documentation supports the specific characteristics of this injury to avoid miscoding.