Even urine screening would be excessive on a regular basis. The pretest probability is too low in the general population for mosts tests that even with incredibly high sensitivity and specificity the positive predictive value sucks due to all the false positives. This adds up into undue stress and unnecessary economic burden.
Edit: Just to add, low dose CT was recently approved for lung cancer screening from a study which showed increased detection and survival for patients 55-80 yrs old with at least a 30-pack year history (20 cigarettes per day for 30 years).
All that said, screenings will ultimately be grounded in genetics more than lifestyle as we become more preventative focused. This also adds granularity to pre-test probabilities of screening tests to ensure they are useful for the population tested.
Edit: Just to add, low dose CT was recently approved for lung cancer screening from a study which showed increased detection and survival for patients 55-80 yrs old with at least a 30-pack year history (20 cigarettes per day for 30 years).
All that said, screenings will ultimately be grounded in genetics more than lifestyle as we become more preventative focused. This also adds granularity to pre-test probabilities of screening tests to ensure they are useful for the population tested.