Understanding Your Diagnosis To help make the diagnosis, your doctor will look for fluid in your chest, abdomen, or heart. This fluid can be a sign of mesothelioma. Deciding on Treatment Your treatment choices depend on your age, your overall health, and the stage of the cancer. The goal of treatment is to control the cancer for as long as possible and to keep you comfortable. Managing Side Effects Side effects during cancer treatment vary from person to person. When side effects occur, they can interfere with your day-to-day life. Your health care team will work to ease any side effects you have.