Pes Anserine Bursitis/Tendinitis
Bursae are fluid filled sacs that act to reduce friction between bones, tendons and/or muscles surrounding certain joints. The Pes Anserine Bursa is located between the tibia (shin bone) and three muscles: Gracilis, Sartorius and Semitendinosus muscles. The pes anserine is the tendon insertion of these three muscles and it sits above the medial collateral ligament.
Pes anserine bursitis is typically caused by repetitive trauma to the bursa from activities such as running, walking and cycling, however other factors that increase the risk of developing pes anserine bursitis include leg length deficiency, muscle imbalances, osteoarthritis, rheumatoid arthritis and calcium deposition disorders. Those that suffer from genu valgum (knocked knees) and pes planus (flat feet) will have a higher risk factor for pes anserine bursitis.
Pes anserine bursitis presents as pain and swelling on the inside of the knee, pain travelling down the inside of the shin, pain from prolonged walking, pain when climbing stairs and increased pain with activities such as jogging, cycling or distance running.