Knee effusion
Accumulation of synovial fluid in or around the knee joint
Knee effusion
Knee effusion, informally known as water on the knee, occurs when excess synovial fluid accumulates in or around the knee joint. It has many common causes, including arthritis, injury to the ligaments or meniscus, or fluid collecting in the bursa, a condition known as prepatellar bursitis.
Read on Wikipedia · Image James Heilman, MD, CC BY-SA 3.0
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