14. Cancers that you can not filter
Unfortunately, you can not screen for all cancers and many show symptoms only later. Some cancers notoriously difficult to detect include the brain, liver, kidneys and pancreas.
Screening itself carries certain risks, including anxiety, pain and bleeding. Sometimes a harmless sign can result in a risky screening procedure. The American Cancer Society has conducted a formal review of screening guidelines. And of course, consult your doctor for any health problem.