Bursitis, Pes Anserine (Pes Anserine Syndrome)
Medicine Central™ is a quick-consult mobile and web resource that includes diagnosis, treatment, medications, and follow-up information on over 700 diseases and disorders, providing fast answers—anytime, anywhere. Explore these free sample topics:
-- The first section of this topic is shown below --
- The pes anserinus (“goosefoot”) is the combined insertion of the sartorius, gracilis, and semitendinosus (SGT) tendons on the anteromedial tibia.
- The pes anserine muscles help flex the knee and resist valgus stress.
- The pes anserine bursa lies deep to the SGT tendons and superficial to the tibial attachment of the medial collateral ligament.
- Pes anserine syndrome is due to irritation of the bursa and/or tendons in this area.
Inflammation of the pes anserine bursa is detected in up to 2.5% of MRI studies of patients with knee pain. The overall incidence is likely higher.
Etiology and Pathophysiology
Pes anserine bursitis occurs due to:
- Overuse injury
- Excessive valgus and rotary stresses
- Mechanical forces and degenerative changes
- Direct trauma
- Age, female gender
- Pes planus; genu valgum
- Knee joint laxity/ligamentous injury
- Long-distance running, hill running; change in mileage
- Swimming (“breaststroker’s knee”); cycling
- Sports with side-to-side (cutting) activity (soccer, basketball, racquet sports)
Commonly Associated Conditions
- Osteoarthritis (OA)
- Knee pain due to OA is often associated with pes anserine bursitis, both of which may need specific treatment.
- Higher grades of OA associated with a thicker pes anserine bursa and larger area of bursitis (1)[C]
- Valgus knee deformity
- Diabetes mellitus (questionable association)