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

Name of the Condition

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

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. The term "sequela" indicates this is a residual condition resulting from the initial fracture, with ongoing effects or complications.

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 growth plate alignment may predispose to injury.

Symptoms

• Pain localized to the knee or thigh, often worsening with movement.
• Swelling and bruising around the affected area.
• Limited range of motion in the knee joint.
• Visible deformity or misalignment of the leg.
• Difficulty bearing weight on the affected limb.

Diagnosis

Diagnosis typically involves a physical examination to assess pain, swelling, and range of motion. Imaging studies, such as X-rays or MRI, are used to confirm the fracture type and extent. The Salter-Harris classification system helps identify the specific fracture pattern, and additional tests may be performed to evaluate joint stability or associated injuries.

Treatment Options

Treatment depends on the severity and displacement of the fracture. Nonsurgical options include immobilization with a cast or brace and activity restriction. Surgical intervention may be necessary for displaced fractures to realign the bone and stabilize the joint. Physical therapy is often recommended during recovery to restore strength and mobility.

Prognosis and Follow-Up

Prognosis varies based on the fracture's severity and treatment. Proper alignment and healing are critical to minimize long-term complications, such as growth disturbances or joint dysfunction. Follow-up appointments monitor healing progress and assess for potential sequelae, with adjustments to treatment plans as needed.

Complications

• Growth plate damage leading to limb length discrepancies or angular deformities.
• Joint stiffness or reduced range of motion.
• Early-onset arthritis due to articular surface involvement.
• Chronic pain or instability in the affected knee.

Lifestyle & Prevention

• Use protective gear during high-impact activities.
• Ensure proper warm-up and technique in sports 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 and adolescents.

When to Seek Professional Help

Seek immediate medical attention if there is severe pain, visible deformity, inability to bear weight, or signs of infection (e.g., fever, increased swelling, redness). Follow up with a healthcare provider if symptoms worsen or do not improve with initial treatment.

Tips for Medical Coders

When coding S79.131S, ensure documentation specifies the sequela of a Salter-Harris Type III physeal fracture of the lower end of the right femur. The "sequela" modifier indicates a residual condition, so clinical notes should clearly describe the ongoing effects or complications resulting from the initial injury. Verify that the fracture type, location, and laterality (right femur) are accurately documented to support code assignment.