Screening for pancreatic and lung cancers

Jonathan M. Iaccarino, MD, and colleagues quantified the risks of screening among COPD patients in a secondary analysis of the more than 75,000 LDCT scans that were performed among the more than 26,000 participants in the National Lung Screening Trial (Chest 2019 Jul 5. doi: 10.1016/j.chest.2019.06.016). In comparison with participants who did not self-report a diagnosis of COPD, the 4,632 participants with self-reported COPD were significantly more likely to require further diagnostic studies, have an invasive procedure, have a complication of any type from the invasive procedure, and suffer a serious complication. The establishment of a lung cancer diagnosis from the invasive procedure, however, occurred in just 6.1% of COPD patients versus 3.6% of patients without COPD.

What this means in practice

At a consensus conference convened by the National Quality Forum, shared decision making was defined as a process of communication in which clinicians and patients work together to make decisions that align with what matters most to patients. Ideally, shared decision making requires clear, accurate, unbiased medical evidence about reasonable alternatives; tailored evidence for individual patients; and the incorporation of patient values, goals, informed preferences and concerns, including a discussion of treatment burdens. All of us wrestle with the challenge of conducting these conversations in a comprehensive and unbiased manner. I am not sure that I have ever achieved an ideal shared decision-making conversation in my practice.

Despite the limitations acknowledged by the authors – self-reported diagnosis of COPD, outcomes that were not the primary focus of the trial, failure to incorporate other important comorbid conditions – the study by Dr. Iaccarino and colleagues helps to quantify risks and benefits for a commonly screened population, specifically COPD patients. Most importantly, it focuses our attention on the key goal of all cancer-screening efforts – applying our personal and technological resources to patients who benefit the most and will suffer the least harm from our efforts.
 

Dr. Lyss has been a community-based medical oncologist and clinical researcher for more than 35 years, practicing in St. Louis. His clinical and research interests are in the prevention, diagnosis, and treatment of breast and lung cancers and in expanding access to clinical trials to medically underserved populations.