Source: Medical News Today
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 the ligaments or meniscus, which is cartilage in the knee.
Orthopaedic & Sports Medicine
James M. Paci, MD is the Director of Orthopedic Surgery and Sports Medicine for Suffolk County for the Orlin and Cohen Orthopedic Group at Northwell Health and an Associate Professor of Orthopedic Surgery. He is board certified in orthopedic surgery and sports medicine, specializing in the care of athletes and disorders of the shoulder, elbow and knee.