Knee Bursae | Knee Exam - MedSchool
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Knee Exam
 

Knee Bursae

 
 

Major Bursae of the Knee

  • Prepatellar bursa - between the patella and the overlying subcutaneous tissue. Bursitis presents as pain and swelling over the patella.
  • Infrapatellar bursa - superficial or deep; inferior to the patella. Bursitis presents as a palpable swelling inferior to the patella.
  • Suprapatellar bursa - between quadriceps tendon and femur. Presents as a palpable mass above the knee joint.
  • Others - anserine bursa, medial collateral ligament bursa, iliotibial bursa, gastrocnemius-semimembranosus bursa.

Baker’s Cyst

    • Look For

    • Swelling and tenderness within the popliteal fossa.
    • Significance

    • May be benign engorgement or may indicate an abnormal communication between the joint and the cyst. Generally involves the gastrocnemius-semimembranosus bursa.
    • Causes of Baker’s Cyst

    • Menisceal tear
    • Anterior collateral ligament insufficiency
    • Degenerative cartilage
    • Septic arthritis

Extra Credit

    • Prepatellar bursa - between the patella and the overlying subcutaneous tissue. Bursitis presents as pain and swelling over the patella.
    • Infrapatellar bursa - superficial or deep; inferior to the patella. Bursitis presents as a palpable swelling inferior to the patella.
    • Suprapatellar bursa - between quadriceps tendon and femur. Presents as a palpable mass above the knee joint.
    • Anserine bursa - in the medial knee, over the distal sartorius, gracilis and semitendinosus tendons, between the tibial collateral ligament and medial tibial condyle.
    • Medial collateral ligament bursa - between the superficial and deep layers of the collateral ligament. Bursitis presents similarly to a medial meniscus tear or medial collateral ligament tear.
    • Iliotibial bursa - between the distal iliotibial band and Gerdy’s tubercle. Presents with lateral knee swelling.
    • Gastrocnemius-semimembranosus bursa - between the medial femoral condyle, semimembranosus tendon and medial head of gastrocnemius. Becomes distended to form a Baker’s cyst.
Last updated on August 17th, 2019
 
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