June 9, 2021

Expanded Recommendations for Lung Cancer Screening: What Clinicians Should Know

Too far or not far enough? And what implementation means for your patients

21-PUL-2132160 CQD Lund Cancer Screening Guidelines

By Peter Mazzone, MD, MPH

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Individuals who currently or previously smoked (those who have quit in the last 15 years) age 50 to 80 with a 20 pack-year smoking history are now candidates for an annual lung cancer screening. This is according to new recommendations published by the U.S. Preventive Services Task Force (USPSTF).

This change follows new evidence that supports the benefit of screening and better overall management associated with its potential risk. Some estimates suggest this expanded eligibility will increase the screening pool by 80% to 90%.

This new recommendation was supported by USPSTF-initiated modeling studies, in addition to findings from the NELSON trial, a large published study that included a starting age of 50 for trial participants.

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Eligibility criteria: A well-intentioned debate

However, there is still some debate within the field as to whether or not the recommendations go too far — or not far enough. The camp supporting the latter argument says that individuals who previously smoked and who are ineligible for screening because of the 15-year cut-off still have a relatively high risk of developing cancer. They suggest that targeted screening tools, like risk calculators, could play a vital role in identifying those who do not meet the new recommendations but may still benefit from screening. On the other hand, others argue that more restrictive criteria are beneficial, sifting out low-risk candidates and, thus, reducing screening exposures, including unnecessary biopsy of (most commonly) benign lung nodules, radiation exposure and undue anxiety.

What does high-quality screening mean?

It’s an important and well-intentioned debate ultimately derived from a desire to improve patient outcomes. It’s also important to remember that lung cancer screening is more complex than the selection criteria alone. A robust screening program means developing outreach and education initiatives, thorough and collaborative diagnostic management and tracking, and smoking cessation and other support programs. Regardless of your views on screening parameters, there is a consensus that high-quality lung cancer screening is paramount. More specifically, this means an investment in the following:

  • Education and outreach campaigns that target eligible individuals.
  • Guidance and support to those who are referred for screening.
  • Performance of high-quality low radiation dose chest CT imaging.
  • Expert interpretation of the imaging findings.
  • Expert management of the imaging findings to minimize testing in those without cancer and efficiently diagnose early-stage lung cancer when it is present.
  • Tracking and outreach to ensure compliance with annual screening and follow-up recommendations
  • Provision of smoking cessation guidance or connection to a smoking cessation program.

Implementation will still take some time, but we are headed in the right direction

Operationalizing these changes may still take time. Private insurers can change their coverage rules anytime between now and the end of 2022. The Centers for Medicare & Medicaid Services will take up a new net coverage determination with a decision expected in 9 to 12 months. Importantly, because many insurers are making coverage changes now, clinicians need to be aware of the criteria and refer those with coverage for screening.

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We look forward to a time when the majority of lung cancers are screen-detected. The updated USPSTF recommendations are a step in that direction.

About the author: Dr. Mazzone is Director of the Lung Cancer Program and Lung Cancer Screening Program for the Respiratory Institute.

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