Low-Dose CT Screening Guidelines for Lung Cancer

Primary Eligibility Criteria

The American College of Chest Physicians recommends annual low-dose CT screening for individuals aged 55-77 years with ≥30 pack-years smoking history who currently smoke or have quit within past 15 years, with a strong recommendation 1, 4
The American College of Chest Physicians recommends annual low-dose CT screening for individuals aged 50-80 years with ≥20 pack-years smoking history who currently smoke or have quit within past 15 years, with a weak recommendation 1, 2

Individuals who don't meet standard age/smoking criteria but have high risk based on validated clinical risk prediction calculators, such as a ≥1.51% 6-year risk on PLCOm2012 calculator or ≥1.33% 5-year risk on LCDRAT calculator, may be considered for screening 1, 4
The American College of Chest Physicians suggests that risk-based approaches may improve screening efficiency and reduce disparities across race and sex 1

Symptomatic individuals should not enter screening programs but instead receive appropriate diagnostic testing, as recommended by the American College of Chest Physicians 5, 4
Individuals with significant comorbidities limiting life expectancy or ability to tolerate treatment should not be screened, according to the American College of Chest Physicians 3

Screening programs should develop strategies to identify symptomatic patients who need diagnostic testing rather than screening, as recommended by the American College of Chest Physicians 5, 4
The American College of Chest Physicians suggests that programs should define what constitutes a positive test based on nodule size, with a threshold of 4mm, 5mm, or 6mm in diameter 5, 7

Radiation exposure from repeated annual scans is a potential harm of low-dose CT screening, as noted by the Praxis Medical Insights 3
Overdiagnosis of indolent cancers is a potential harm of low-dose CT screening, as noted by the Praxis Medical Insights 3

Smoking cessation counseling should be provided alongside screening, as recommended by the Praxis Medical Insights, and screening is not a substitute for smoking cessation 3