Mouronte-Roibas C, et al. - The prevalence and underdiagnosis rate of chronic obstructive pulmonary disease (COPD) in lung cancer (LC) patients were determined in this multicenter hospital-based study. The clinical and functional features were compared between LC patients with and without COPD. Researchers reported the prevalence as well as underdiagnosis of COPD among LC patients. Squamous LC, greater comorbidities, and a lower monoxide transfer coefficient (KCO) were more often detected among patients with LC+COPD. Although not statistically significant, the median survival of LC-only patients was 37% longer than that of LC+COPD patients (22 vs 16 months). It was recommended to make more effort for an early diagnosis of COPD to select patients at higher risk of developing LC.