They are not the same. A step sister is a sister by marriage. That is her mother or father married your mother or father, so she is not a sister by blood. A half sister has a mother or father in common with you but not both parents as that would be a full sister.
Checking for cancer (or for conditions that may become cancer) in people who have no symptoms is called screening. Screening can help doctors find and treat several types of cancer early. Early detection is important because when abnormal tissue or cancer is found early, it may be easier to treat.By the time symptoms appear, cancer may have begun to spread and is harder to treat. Several screening tests have been shown to detect cancer early and to reduce the chance of dying from that cancer.ut it is important to keep in mind that screening tests can have potential harms as well as benefits. 1  Some screening tests may cause bleeding or other health problems. 2  Screening tests can have false-positive resultsâthe test indicates that cancer may be present even though it is not. 3  Screening tests can have false-negative resultsâthe test 4  ... Ove
Screening tests are laboratory tests that help to identify people with increased risk for a condition or disease before they have symptoms or even realize they may be at risk so that preventive measures can be taken.They are an important part of preventive health care.Screening tests help detect disease in its earliest and most treatable stages. Therefore, they are most valuable when they are used to screen for diseases that are both serious and treatable, so that there is a benefit to detecting the disease before symptoms begin.They should be sensitive-that is, able to correctly identify those individuals who have a given disease.Many routine tests performed at regular health exams are screening tests. Cholesterol testing and Pap smears for women are examples. Newborns are screened for a variety of conditions at birth.herefore, they are most valuable when they are used to screen for diseases that are both serious and treatable, so that there is a benefit to detecting the disease before symptoms begin. They should be sensitive-that is, able to correctly identify those individuals who have a given disease.