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 ...

A popliteal cyst, also known as a Baker’s cyst, is a fluid-filled swelling that causes a lump at the back of the knee, leading to tightness and restricted movement. The cyst can be painful when you ...

A Baker’s cyst, or popliteal cyst, is a fluid-filled swelling that develops on the back of a person’s knee. Rarely, Baker’s cysts may rupture. This does not always cause symptoms, but if it does, a ...