3.2.5. Routine Screenings By Whitmore31 Sep 10, 2052 Prostate Cancer PSA Blood Test. No results every 10 years. 1-2 results every 2 years. Sep 10, 2052 Colon Caner Stool examination or visual examination. If positive take colonoscopy. 10 year repeating. Sep 10, 2057 Lung Cancer CT Scan. With history of smoking repeat every year until 74.