Cancer screening is a critical process that involves testing for cancer in individuals without symptoms. The goal is to detect cancer at its earliest stages when it is most treatable. There are various methods used for cancer screening, and the appropriate test depends on the type of cancer being screened. Here's a general overview of how cancer screening is done: 1. Physical Exam: A healthcare professional performs a physical examination to check for any unusual signs or symptoms that could indicate the presence of cancer. 2. Imaging Tests: These include X-rays, CT scans, MRIs, and PET scans, which can create images of the inside of the body to detect tumors or abnormal growths. 3. Laboratory Tests: Blood tests, urine tests, or other fluid tests can be used to detect certain substances that may be higher than normal because of cancer. 4. Pap Test: For cervical cancer screening, a Pap test checks for precancerous cells in the cervix. 5. Mammogram: A mammogram is an X-ray of the breast used to screen for breast cancer. 6. Colonoscopy: This is a procedure that allows doctors to look inside the large intestine for polyps or cancer. 7. Prostate-Specific Antigen (PSA) Test: For prostate cancer, a blood test measures the level of PSA, a substance that may be higher when cancer is present. 8. Molecular and Genetic Testing: In some cases, testing for specific gene mutations or molecular markers can indicate an increased risk for certain types of cancer. It's important to note that not all cancers have a recommended screening test, and not everyone should be screened for every type of cancer. The decision to undergo cancer screening should be based on an individual's age, health history, and risk factors, and should be discussed with a healthcare provider. read more >>

Screening tests can help find cancer at an early stage, before symptoms appear. When abnormal tissue or cancer is found early, it may be easier to treat or cure. ... Screening tests are done when you have no cancer symptoms.read more >>