Screening can help prevent colorectal and cervical cancers by detecting precancerous lesions that can be removed. It can also detect some cancers early, when treatment is more often successful. Screening is known to help reduce mortality for cancers of the breast, colon, rectum, cervix, prostate, and lung (among current or former heavy smokers). In addition, a heightened awareness of changes in certain parts of the body, such as the breast, skin, mouth, eyes, or genitalia, may also result in the early detection of cancer.”  -American Cancer Society.