Cancer Screening is a preventive measure to detect cancer or cancer-like symptoms early so that the patient has better chances of survival. Oncologists stress on early detection because if abnormal tissue or cancer is found early, it is easier to treat. Preventive screening is important as by the time symptoms appear, cancer may have begun to spread and may be fatal. Some tests have been shown to detect cancer early and lower the chance of fatality from the disease. Screening tests can have false-positive results which effectively mean that the test indicates that cancer may be present even though it is not. False-positive test results cause anxiety and are usually followed by additional tests and procedures which have potential harms. Screening tests include a physical exam of the body to check general signs of health, including checking for signs of disease, such as lumps or anything else that seems unusual. A history of the patient's health habits and past illnesses and treatments is also investigated. Laboratory tests are also part of the preventive screening and include testing of samples of tissue, blood, urine, or other substances in the body. Tests also include imaging procedures like mammograms from breast cancer. Genetic tests to investigate the gene mutations are also beneficial for detecting early stages of cancer. Some cancers never display any symptoms or become life-threatening, but if detected by a screening test, cancer may be treated.
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