I believe Japan is working on urine tests for brain cancers too. Also, just because cancer is detected doesn't mean action needs to be taken. PSA tests are a g

I believe Japan is working on urine tests for brain cancers too. Also, just because cancer is detected doesn't mean action needs to be taken. PSA tests are a good example of this. There's a fine line between catching things before they are a problem and performing potentially harmful interventions for something that might never become a problem. But the blood and urine tests are great for screening, then using imaging or other tests to determine if it needs to be addressed.