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Pes Anserine Bursitis
Definition: Pes bursitis is the result of inflammation at the pes anserine bursa on the medial aspect of the knee.
Causes: The pes anserine is the anatomical term used to describe the insertion of the Gracilis, Semitendinosus, and Sartorius muscles, where the pes anserine bursa can be found. A bursitis is the result of excessive stress at this area. Pes anserine bursa usually occurs along side existing knee conditions such as osteoarthrosis. Other causes of Pes anserine bursitis includes, overuse of the hamstrings, especially if they are not stretched, a sudden increase in physical activity such as long distance running, especially up hills. Pes anserine bursitis can also be caused by direct trauma to the medial aspect of the knee. Pes anserine bursitis has also been diagnosed in swimmers and is occasionally referred to as breaststroker's knee, due to the valgus forces to which the knees are subjected.
Examination: A patient suffering form pes anserine bursitis will usually present with pain on the medial aspect of the knee. Patients commonly report that the pain is aggravated by climbing stairs, and palpation of the area is often sore and oedematous. If the onset was traumatic, the practitioner should verify the integrity of the cruciates, menisci and lateral collaterals. As with any bursitis, the examiner should determine whether it is septic or not.