A Baker's cyst is a pocket of joint fluid that forms a lump behind the knee. It is also called a popliteal cyst.
Last Revised: August 7, 2012
Author: Healthwise Staff
Medical Review: William H. Blahd, Jr., MD, FACEP - Emergency Medicine & Kenneth J. Koval, MD - Orthopedic Surgery, Orthopedic Trauma
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