Retrocalcaneal Bursitis

Bursae are fluid-filled sacs located at points of contact between bony landmarks and overriding tendons. There are at least 150 bursae distributed symmetrically throughout the human body. Additional bursae can develop in areas of increased friction. Each bursa acts as a cushion that minimizes friction and allows smooth, gliding interactions between bones and tendons. The bursa is lined by a membrane that secretes synovial fluid. Synovial fluid serves to lubricate the area and facilitate motion in confined joint spaces. Without the bursae, ...

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