A recent study determined that patients with chronic obstructive pulmonary disease (COPD) and non-small cell lung cancer (NSCLC) had similar tumor microenvironment, but higher tumor infiltrating lymphocytes (TIL) exhaustion, than patients without COPD. The use of an anti-programmed cell death-1 (PD-1) antibody, nivolumab, was also demonstrated to be effective in this population.