Cancer screening is the practice of testing or examining individuals for early signs of cancer before symptoms develop. The goal is to detect cancer at an early stage when it is more treatable and potentially curable. Screening tests can include imaging tests such as mammograms or CT scans, as well as laboratory tests like blood tests or Pap smears. Screening recommendations vary depending on the type of cancer, age, and risk factors of the individual. Regular screening can help reduce cancer mortality rates by detecting cancer early and facilitating prompt treatment.