M67.5 Plica syndrome

Name of the Condition

• Plica syndrome (ICD-10 Code: M67.5)

Summary

Plica syndrome is a condition involving the inflammation or irritation of the plica, a fold of synovial tissue within the knee joint. This can lead to pain, swelling, and functional limitations, often triggered by repetitive motion or trauma.

Causes

The condition may result from mechanical irritation, such as repetitive knee flexion or extension, or direct trauma to the knee. In some cases, it develops after surgery or due to underlying joint instability.

Risk Factors

• Repetitive knee movements (e.g., running, cycling)
• Previous knee injuries or surgery
• Occupational activities requiring prolonged kneeling
• Sports involving sudden direction changes
• Congenital or developmental plica abnormalities

Symptoms

• Anterior or medial knee pain, especially with activity
• Swelling or tenderness around the knee
• A snapping or popping sensation during movement
• Stiffness or catching in the knee joint
• Pain that worsens with prolonged sitting or climbing stairs

Diagnosis

Diagnosis typically involves a physical examination to assess knee movement and tenderness, along with patient history to identify contributing activities. Imaging studies like MRI or ultrasound may be used to rule out other knee conditions, such as meniscal tears or ligament injuries.

Treatment Options

• Rest and activity modification to reduce knee stress
• Physical therapy focusing on strengthening and flexibility
• Nonsteroidal anti-inflammatory drugs (NSAIDs) for pain relief
• Corticosteroid injections for severe inflammation
• Surgical intervention (plica excision) for persistent symptoms

Prognosis and Follow-Up

Most patients improve with conservative treatment, though recovery may take several weeks. Follow-up care includes monitoring for symptom recurrence and adjusting activity levels. Surgical outcomes are generally favorable, with most patients returning to normal function.

Complications

• Chronic knee pain or instability
• Recurrent inflammation or swelling
• Delayed recovery due to persistent irritation
• Rarely, progression to degenerative joint changes

Lifestyle & Prevention

• Avoid repetitive knee-stressing activities
• Use proper form during exercise or work tasks
• Incorporate regular stretching to maintain flexibility
• Wear supportive footwear and knee braces if needed
• Gradually increase activity intensity to prevent overuse

When to Seek Professional Help

Seek care if knee pain persists despite rest, worsens with movement, or is accompanied by significant swelling, locking, or instability. Prompt evaluation is recommended if symptoms interfere with daily activities or worsen over time.

Tips for Medical Coders

Document the affected knee (e.g., left, right, bilateral) and any contributing factors, such as trauma or overuse. Ensure the diagnosis is supported by clinical findings, including physical exam results or imaging, to justify coding. Note any surgical interventions or conservative treatments for accurate reporting.