Clinical trials,
 also called research studies, test new treatments in people with 
cancer. The goal of this research is to find better ways to treat cancer
 and help cancer patients. Clinical trials test many types of treatment 
such as new drugs, new approaches to surgery or radiation therapy, new 
combinations of treatments, or new methods such as gene therapy.
A clinical trial is one of the final stages of a long and careful 
cancer research process. The search for new treatments begins in the 
laboratory, where scientists first develop and test new ideas. If an 
approach seems promising, the next step may be testing a treatment in 
animals to see how it affects cancer in a living being and whether it 
has harmful effects. Of course, treatments that work well in the lab or 
in animals do not always work well in people. Studies are done with 
cancer patients to find out whether promising treatments are safe and 
effective.
Patients who take part may be helped personally by the treatment they
 receive. They get up-to-date care from cancer experts, and they receive
 either a new treatment being tested or the best available standard 
treatment for their cancer. At the same time, new treatments also may 
have unknown risks, but if a new treatment proves effective or more 
effective than standard treatment, study patients who receive it may be 
among the first to benefit. There is no guarantee that a new treatment 
being tested or a standard treatment will produce good results. In 
children with cancer, a survey of trials found that those enrolled in 
trials were on average not more likely to do better or worse than those 
on standard treatment; this confirms that success or failure of an 
experimental treatment cannot be predicted.[14]
 
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