The anserine bursa is a small fluid-filled sac located near the knee joint, specifically beneath the pes anserinus, which is the insertion point for three muscles: the sartorius, gracilis, and semitendinosus. This bursa helps reduce friction and allows smooth movement between the tendons of these muscles and the underlying bone and tissues. In some cases, the anserine bursa can become inflamed, a condition known as anserine bursitis.
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