Where evidence is strongest, mixed, or limited—and what it means for clinicians.
Breast Screening (USPSTF 2024)
Recommendation: Biennial mammography, ages 40–74; moderate net benefit [1].
Evidence review notes modality differences; DBT may reduce recalls and alter stage distribution vs DM, but mortality impact data remain limited [5].
Mortality reduction established historically; ongoing debate on all-cause mortality effects in trials [8], [2].
Life-Years Gained Meta-analysis (JAMA IM 2024)
Sigmoidoscopy: +110 days estimated lifetime gain; strong RCT base [2].
FIT and mammography: no significant lifetime gain in long-term RCTs; interpret with caution due to adherence, crossover, and contemporaneous treatments [2].
Estimate pertains to population averages; individual benefit varies by baseline risk and test performance [2].
Lung Cancer Screening (ACS 2023)
LDCT efficacy: ~20% relative mortality reduction vs CXR (NLST) underpinning recommendations [3].
Updated guidance discusses cessation >15 years, screening past 80, and radiation-risk tradeoffs; shared decision-making emphasized [3].
Utilization Trends (2023–2024)
Breast screening up-to-date rates increased; cervical and colorectal decreased, highlighting need for outreach and navigation [4].
Remote, tailored interventions improve screening completion in rural populations [6].
Harms and Trade-offs
Breast: false positives, overdiagnosis, additional imaging/biopsy; consider DBT to reduce recalls where available [1], [5].
Lung: false positives, incidental findings, radiation; structured LDCT programs mitigate harms [3].
CRC: colonoscopy complications (bleeding/perforation) vs noninvasive test adherence advantages [2].
Prevention Beyond Screening
Behavioral: weight control, physical activity, tobacco cessation [7].
Chemoprevention: selective use (e.g., aspirin, SERMs/aromatase inhibitors) in appropriate risk groups; balance benefits and bleeding or thrombotic risks [7].