A bursa is a lubricated pocket that exists to facilitate movement.
In the knee there are several bursae (plural of bursa), the main ones being:
- suprapatellar bursa
- pre-patellar bursa
- infrapatellar bursa
- deep infrapatellar bursa
- pes anserine bursa
Occasionally bursae become inflamed and distended with fluid. They can also become infected. The condition of an inflamed bursa is called bursitis.
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