Patellofemoral Syndrome (Chondromalacia Patella)

• Due to degeneration of the cartilage underneath the patella
• Patients often present with:
  • A grinding sensation when the knee is extended
  • Pain in the front of the knee that typically worsens after sitting for a long period of time
  • Knee pain that worsens with using stairs, running or when needing to bend the knee deeply (i.e.: squats)
• Commonly thought to be due to overuse (i.e.: new running program, or marching as in military recruits), but can also be due to anatomic abnormalities like pes planus or a large Q angle.  Ultimate cause is likely to be multifactorial
• 
• Can be treated with NSAIDs, and limiting activity
• Physical Therapy that helps to strengthen the quadriceps can help prevent the patella from grinding on the femoral condyles.

References

Juhn MS et al. Patellofemoral pain syndrome: a review and guidelines for treatment. Am Fam Physician. (1999)