M91.1 Juvenile osteochondrosis of head of femur [Legg-Calve-Perthes]

Name of the Condition

• Juvenile Osteochondrosis of Head of Femur [Legg-Calve-Perthes]

Summary

Juvenile osteochondrosis of the head of the femur, also known as Legg-Calvé-Perthes disease, is a condition affecting the growing hip joint in children. It involves temporary loss of blood supply to the femoral head, leading to bone fragmentation and potential deformity. The condition typically progresses through stages of necrosis, reossification, and remodeling, with outcomes varying based on severity and treatment.

Causes

The exact cause is not fully understood, but it is thought to result from disrupted blood flow to the femoral head, leading to avascular necrosis. Mechanical stress, genetic predisposition, and developmental factors may contribute to the disruption of blood supply.

Risk Factors

• Age: Most commonly affects children between 4 and 10 years old.
• Gender: More prevalent in males.
• Genetic factors: Family history may increase risk.
• Mechanical stress: Repetitive or excessive load on the hip.

Symptoms

• Hip or groin pain, often worsened by activity.
• Limping or altered gait.
• Reduced range of motion in the hip.
• Pain that may radiate to the thigh or knee.
• In some cases, asymptomatic or mild discomfort.

Diagnosis

Diagnosis involves a physical examination to assess hip mobility and pain, followed by imaging studies such as X-rays, MRI, or CT scans to evaluate the femoral head. Clinical evaluation of symptoms and history is also key.

Treatment Options

• Rest and Activity Modification: Reducing weight-bearing activities to prevent further damage.
• Physical Therapy: To maintain hip range of motion.
• Medications: Pain relief medications such as NSAIDs.
• Surgery: In severe cases, procedures like osteotomy to reshape the femoral head or pelvic osteotomy.

Prognosis and Follow-Up

Prognosis depends on the severity of the condition and the age of onset. Early diagnosis and appropriate treatment can improve outcomes. Follow-up care typically includes regular monitoring of hip development and function, with imaging studies to assess healing.

Complications

• Hip deformity or misalignment.
• Early-onset arthritis in adulthood.
• Persistent pain or limited mobility.
• Leg length discrepancy.

Lifestyle & Prevention

• Avoid excessive or repetitive hip stress during growth periods.
• Maintain a healthy weight to reduce joint load.
• Follow prescribed activity restrictions during treatment.

When to Seek Professional Help

Seek medical attention if a child develops persistent hip pain, limping, or reduced mobility. Early evaluation is important to prevent long-term complications.

Tips for Medical Coders

Document the specific hip affected (e.g., right/left) and any associated procedures or treatments. Ensure clinical documentation supports the diagnosis and stage of the condition for accurate coding. Note that this code is specific to juvenile osteochondrosis of the femoral head and should not be confused with other hip or pelvic osteochondrosis codes.