A cyst is a sac of tissue containing fluid or air that can form in many areas of the body. Cysts often do not need to be removed unless they are causing pain or other problems. There are several ...

Q: Please give me all the information you can about Baker's cysts. Thank you. -- B.K., Westbrook, Minn. A: Baker's cysts (also called popliteal cysts) result from a form of bursitis or inflammation of ...