Every clinical trial is designed to answer a set of research questions.
If you fit the guidelines for a trial, you may be eligible to take part. Each study enrolls patients with certain types and stages of cancer and certain health status. A study that involves two or more treatments can yield reliable answers only if all the patient cases are the same, so they can be compared with each other. Staging tells how far the disease has spread. Deciding on treatment depends on many things, including the stage of the disease and your general health.