S79.112A Salter-Harris Type I physeal fracture of lower end of left femur, initial encounter for closed fracture

Name of the Condition

Salter-Harris Type I physeal fracture of lower end of left femur, initial encounter for closed fracture

Summary

A Salter-Harris Type I physeal fracture of the lower end of the left 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. The term "initial encounter" indicates this is the first presentation for the injury, and "closed fracture" means the overlying skin is intact.

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 increase risk.

Symptoms

• Pain localized to the knee or thigh, often worsening with movement.
• Swelling and tenderness over the affected area.
• Limited range of motion in the knee.
• Inability to bear weight on the affected leg.
• Visible deformity in severe cases, though less common with Type I fractures.

Diagnosis

Diagnosis typically involves a physical examination to assess pain, swelling, and range of motion. Imaging studies, such as X-rays, are used to confirm the fracture and rule out associated injuries. In some cases, MRI or CT scans may be ordered to evaluate the physis and surrounding structures more thoroughly. The Salter-Harris classification system helps determine the fracture type based on the involvement of the growth plate and adjacent bones.

Treatment Options

Treatment depends on the severity and displacement of the fracture. Non-displaced fractures are often managed with immobilization, such as a cast or brace, to allow healing. Displaced fractures may require closed reduction (realignment without surgery) or, in rare cases, surgical intervention to stabilize the growth plate. Pain management and physical therapy are common adjuncts to support recovery and restore function.

Prognosis and Follow-Up

Prognosis is generally favorable for Salter-Harris Type I fractures, especially when treated promptly. Most children recover fully without long-term complications, though regular follow-up with imaging may be recommended to monitor growth plate integrity. Long-term outcomes depend on the extent of displacement and adherence to treatment plans.

Complications

• Growth disturbances: Rare, but possible if the growth plate is damaged.
• Malunion or nonunion: Improper healing may affect limb alignment.
• Chronic pain or stiffness: May occur if recovery is incomplete.
• Infection: Risk is low but present in cases requiring surgery.

Lifestyle & Prevention

• Encourage protective gear during high-impact activities.
• 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 in growing children.

When to Seek Professional Help

Seek immediate medical attention if there is severe pain, inability to move the leg, visible deformity, or signs of infection (e.g., fever, redness). Persistent pain or swelling after initial treatment also warrants evaluation.

Tips for Medical Coders

Document the fracture location (left femur), type (Salter-Harris Type I), encounter status (initial), and fracture type (closed) to ensure accurate coding. Include details on imaging, treatment, and follow-up to support clinical and coding workflows.