Water on the knee, or knee effusion, refers to the buildup of fluid in and around the knee joint. This condition leads to a painful, swollen knee and can be caused by various factors, including ...

Knee effusion, sometimes called water on the knee, occurs when excess fluid accumulates in or around the knee joint. Common causes include arthritis and injury to knee ligaments and cartilage. A small ...

This review on joint aspiration and injection focuses on three common clinical problems: how to deal with 'dry taps', especially when a septic joint is suspected in the differential diagnosis; how to ...