M92.4 Juvenile osteochondrosis of patella

Name of the Condition

• Juvenile osteochondrosis of patella

Summary

Juvenile osteochondrosis of the patella is a childhood condition affecting the growth region of the kneecap, where stress or injury leads to pain and inflammation. This disorder commonly affects active children and adolescents who participate in sports.

Causes

Repetitive stress or chronic trauma to the knee during growth spurts. Overuse from activities involving jumping or running. Potential genetic predisposition affecting bone growth.

Risk Factors

• Age: Typically affects children and adolescents.
• Physical activity: High levels of sports participation.
• Gender: More common in boys.
• Rapid growth periods during puberty.

Symptoms

• Pain and tenderness around the front of the knee.
• Swelling or inflammation near the patella.
• Difficulty in movement or reduced flexibility.

Diagnosis

Clinical examination assessing symptoms and activity history. Imaging tests like X-rays or MRI for visualizing knee structure.

Treatment Options

• Rest and reduced activity to alleviate stress on the knee.
• Physical therapy to strengthen muscles and improve flexibility.
• NSAIDs for pain and inflammation relief.
• In severe cases, immobilization using a brace.

Prognosis and Follow-Up

Most cases resolve with conservative management as the child matures. Follow-up may include monitoring for persistent symptoms or functional limitations. Long-term outcomes are generally favorable with appropriate treatment.

Complications

• Persistent pain or functional impairment if untreated.
• Rarely, chronic knee instability or altered gait.

Lifestyle & Prevention

• Gradual return to activity after symptoms resolve.
• Proper warm-up and stretching before sports.
• Use of supportive footwear and knee pads during high-impact activities.

When to Seek Professional Help

Seek care if pain persists despite rest, worsens with activity, or interferes with daily function. Consult a healthcare provider for persistent swelling, locking, or instability of the knee.

Tips for Medical Coders

Document the affected knee (e.g., right/left) and any associated symptoms or complications. Ensure clinical correlation with imaging findings to support the diagnosis. Code M92.4 is specific to the patella; avoid using for other skeletal sites.