Difference between revisions of "Patellofemoral syndrome"
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| + | ==Background== | ||
| + | [[File:Knee diagram2.png|thumb|Anatomy of anterolateral aspect of right knee.]] | ||
| + | *Also known as "Runner's Knee" | ||
| + | *Major cause of anterior knee pain (especially in women) | ||
| + | **Pain comes from contact of posterior surface of patella with the femur | ||
| + | *Term Chondromalacia patella typically used synonymously, however this term implies softening of the cartilage | ||
| + | ===Major Causes=== | ||
| + | #Focal trauma (least common) | ||
| + | #Overuse | ||
| + | #Abnormal patellar tracking (due to quadriceps weakness) | ||
| + | |||
| + | ==Clinical Features== | ||
| + | *Gradual onset of unilateral, anterior knee pain, nonradiating | ||
| + | *Pain worsened by prolonged knee flexion ("moviegoer syndrome") and stair climbing | ||
| + | |||
| + | ===Patellar grind test=== | ||
| + | *Press patella away from femoral condyles while patient contracts the quadriceps | ||
| + | *Sudden patellar pain and relaxation of the muscle is positive test | ||
| + | |||
| + | ==Differential Diagnosis== | ||
| + | {{Knee DDX}} | ||
| + | |||
| + | ==Evaluation== | ||
| + | *Knee XR series | ||
| + | **Patella may not line up with groove of the femur on sunrise view | ||
| + | **Decreased space posterior to patella | ||
| + | **Bony erosions | ||
| + | |||
| + | ==Management== | ||
| + | *Conservative therapy (with emphasis on physical therapy and strengthening) | ||
| + | |||
| + | ==Disposition== | ||
| + | *Outpatient management | ||
==See Also== | ==See Also== | ||
*[[Knee (Minor)]] | *[[Knee (Minor)]] | ||
| − | == | + | ==References== |
| − | + | <references/> | |
| + | |||
| − | [[Category: | + | [[Category:Orthopedics]] |
| + | [[Category:Sports Medicine]] | ||
Latest revision as of 21:44, 21 May 2020
Contents
Background
- Also known as "Runner's Knee"
- Major cause of anterior knee pain (especially in women)
- Pain comes from contact of posterior surface of patella with the femur
- Term Chondromalacia patella typically used synonymously, however this term implies softening of the cartilage
Major Causes
- Focal trauma (least common)
- Overuse
- Abnormal patellar tracking (due to quadriceps weakness)
Clinical Features
- Gradual onset of unilateral, anterior knee pain, nonradiating
- Pain worsened by prolonged knee flexion ("moviegoer syndrome") and stair climbing
Patellar grind test
- Press patella away from femoral condyles while patient contracts the quadriceps
- Sudden patellar pain and relaxation of the muscle is positive test
Differential Diagnosis
Knee diagnoses
Acute knee injury
- Knee dislocation
- Knee fractures
- Meniscus and ligament knee injuries
- Patella dislocation
- Patellar tendonitis
- Patellar tendon rupture
- Quadriceps tendon rupture
Nontraumatic/Subacute
- Arthritis
- Gout and Pseudogout
- Osgood-Schlatter disease
- Patellofemoral syndrome (Runner's Knee)
- Patellar tendonitis (Jumper's knee)
- Pes anserine bursitis
- Popliteal cyst (Bakers cyst)
- Prepatellar bursitis (nonseptic)
- Septic bursitis
- Septic joint
- DVT
Evaluation
- Knee XR series
- Patella may not line up with groove of the femur on sunrise view
- Decreased space posterior to patella
- Bony erosions
Management
- Conservative therapy (with emphasis on physical therapy and strengthening)
Disposition
- Outpatient management