Anserine tendinobursitis syndrome is a pain to the inner part of the leg, just below the knee joint. It is at a location where three tendons meet and connect to bone. The muscles include the sartorius, gracilis, and semitendinosus. There are also one or more bursae at this location. A bursa is a fluid-filled sac that decreases friction between bones and muscles.

When bursae become inflamed it is called bursitis. When tendons become inflamed it is called tendonitis. For this pain syndrome, the exact cause is unknown, but it may involve injury or inflammation to the tendons or bursae.

Tendons Meet and Connect to Bone
medial knee muscle insertion
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This may be a treatable condition. Contact your doctor if you think you may have this syndrome.

This condition is most commonly caused by repeated stress to the knee. A direct injury to the knee can also cause this condition