S79.111 Salter-Harris Type I physeal fracture of lower end of right femur

Name of the Condition

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

Summary

A Salter-Harris Type I 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, which is the area of developing bone responsible for longitudinal growth. The injury involves separation of the growth plate without significant displacement or associated bone damage, depending on the mechanism and severity of trauma.

Causes

Salter-Harris Type I 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 from the adjacent bone. 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 around the growth plate area.
• Limited range of motion in the affected leg.
• Difficulty bearing weight or walking.
• Visible deformity in severe cases, though displacement is uncommon in Type I fractures.

Diagnosis

Diagnosis is typically made through clinical evaluation and imaging. A physical examination assesses pain, swelling, and range of motion. Imaging, such as X-rays, confirms the fracture by showing separation of the growth plate. In some cases, additional imaging (e.g., MRI) may be used to evaluate soft tissue involvement or subtle fractures.

Treatment Options

Treatment depends on the severity and displacement of the fracture. Nondisplaced fractures may be managed with immobilization (e.g., casting or bracing) and activity restriction. Displaced fractures may require closed reduction (realignment) or, in rare cases, surgical intervention to restore proper alignment. Follow-up imaging ensures proper healing.

Prognosis and Follow-Up

Prognosis is generally favorable with appropriate treatment, as Salter-Harris Type I fractures have a low risk of growth disturbance. Follow-up appointments monitor healing and assess for complications, such as growth plate damage or limb length discrepancy. Physical therapy may be recommended to restore strength and mobility.

Complications

• Growth plate damage: Risk of impaired bone growth, leading to limb length discrepancy or angular deformity.
• Nonunion or delayed union: Rare, but possible if the fracture does not heal properly.
• Infection: Potential risk with surgical intervention.
• Chronic pain: May occur in some cases, particularly with residual joint instability.

Lifestyle & Prevention

• Encourage protective gear during high-impact activities (e.g., helmets, pads).
• Promote proper warm-up and technique in sports to reduce injury risk.
• Ensure adequate calcium and vitamin D intake to support bone health.
• Avoid overuse or repetitive stress on the knee and thigh in growing children.

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, swelling). Follow up with a healthcare provider if symptoms worsen or do not improve with initial treatment.

Tips for Medical Coders

Use code S79.111 for a Salter-Harris Type I physeal fracture of the lower end of the right femur. Document the fracture type (Type I) and laterality (right) clearly in the medical record. Ensure the diagnosis aligns with clinical findings and imaging results to support accurate coding.