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 ...

*Refers to the latest 2 years of stltoday.com stories. Cancel anytime. Dr. Roach: I was diagnosed with several liver cysts over 15 years ago. My primary doctor and I follow the growth of the cysts by ...