Q: What is a Baker's cyst, and what is the best way to get rid of it? A: A Baker's cyst is a collection of fluid behind the knee. It was named after a British surgeon, William Baker, who described ...

Q: I have a Baker's cyst in my right knee. It has been drained twice and recurred. Are there any other treatments for it?

DEAR MAYO CLINIC: I developed a Baker’s cyst on the back of my knee several months ago. My doctor drained the fluid from it, but now it’s back. What could be causing this? What is the best way to ...

A cyst is a bag-like growth that contains fluid, air, or other substances. It can grow almost anywhere on the body. A Baker’s cyst — also called a popliteal cyst — is a fluid-filled cyst on the back ...