S79.122A Salter-Harris Type II physeal fracture of lower end of left femur, initial encounter for closed fracture

Name of the Condition

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

Summary

A Salter-Harris Type II 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 and includes a metaphyseal fragment, as defined by the Salter-Harris classification system. The injury involves separation of the growth plate with a portion of the metaphysis attached, without significant displacement of the epiphysis. The term "initial encounter" indicates this is the first presentation for the injury, and "closed fracture" means the overlying skin remains intact.

Causes

Salter-Harris Type II 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, often with a small piece of the metaphysis attached. 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: Variation in bone density or growth plate structure may influence risk.

Symptoms

• Pain and swelling localized to the knee or thigh.
• Difficulty bearing weight or moving the affected leg.
• Visible deformity or abnormal positioning of the limb.
• Limited range of motion in the knee joint.
• Tenderness to touch at the fracture site.

Diagnosis

Diagnosis is typically made through a combination of clinical evaluation and imaging. A physical examination assesses pain, swelling, and functional limitations. Imaging studies, such as X-rays, are used to confirm the fracture type and location. The Salter-Harris classification system helps identify the specific fracture pattern, distinguishing Type II from other physeal injuries. Additional imaging, like MRI or CT, may be used if the fracture is not clearly visible on X-rays or to assess associated soft tissue damage.

Treatment Options

Treatment depends on the severity and displacement of the fracture. Nonsurgical management, including immobilization with a cast or brace, is common for stable fractures. Surgical intervention may be required for displaced or unstable fractures, involving realignment and fixation with pins or screws. Pain management and physical therapy are often part of the recovery process to restore function and strength.

Prognosis and Follow-Up

Prognosis is generally favorable with appropriate treatment, especially for closed fractures. Most patients recover fully without long-term complications, though growth plate injuries carry a small risk of growth disturbance. Follow-up care includes regular monitoring of healing through imaging and clinical assessments. Physical therapy may be recommended to improve mobility and prevent stiffness. Long-term follow-up is important to ensure normal growth and development.

Complications

• Growth disturbance: Rare, but possible if the growth plate is damaged.
• Malunion or nonunion: Improper healing may require additional treatment.
• Infection: Risk is low but higher with surgical intervention.
• Stiffness or reduced range of motion: May occur during recovery.
• Chronic pain: Uncommon but possible in severe cases.

Lifestyle & Prevention

• Use protective gear during high-impact sports (e.g., helmets, pads).
• Ensure proper training 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.
• Warm up and stretch before physical activity to prepare muscles and joints.

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, swelling). Prompt evaluation is important to prevent complications and ensure proper treatment.

Tips for Medical Coders

This code represents a Salter-Harris Type II physeal fracture of the lower end of the left femur, with "initial encounter" indicating the first presentation and "closed fracture" specifying no skin breach. Documentation should include the fracture type, location (left femur), encounter status, and whether the fracture is open or closed. Ensure the medical record supports the specific details of the injury to justify code assignment.