The goal of this exercise is to detect cancers before their symptoms manifest. The test encompasses medical imaging, blood tests, urinalysis and other tests. It is common knowledge that the benefit of having a cancer screen done outweighs outweigh anybody harm that may result from the process. When cancerous tissues are detected early, they are easy to cure or treat. The most common cancers that are routinely screened are breast, colon, oral, prostate, pancreatic, lung, bowel and cervical cancers.