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The association between combined non-cystic fibrosis bronchiectasis and lung cancer in patients with chronic obstructive lung disease

Authors Kim YW, Jin KN, Heo EY, Park SS, Chung HS, Kim DK

Received 6 January 2015

Accepted for publication 25 February 2015

Published 4 May 2015 Volume 2015:10(1) Pages 873—879

DOI https://doi.org/10.2147/COPD.S80439

Checked for plagiarism Yes

Review by Single-blind

Peer reviewer comments 4

Editor who approved publication: Dr Richard Russell

Yeon Wook Kim,1 Kwang-Nam Jin,2 Eun Young Heo,3 Sung Soo Park,3 Hee Soon Chung,3 Deog Kyeom Kim3

1Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, Seoul National University College of Medicine, Seoul, Republic of Korea; 2Department of Radiology, Seoul National University College of Medicine, Seoul Metropolitan Government-Seoul National University Boramae Medical Center, Seoul, Republic of Korea; 3Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, Seoul National University College of Medicine, Seoul Metropolitan Government-Seoul National University Boramae Medical Center, Seoul, Republic of Korea

Background: Whereas the epidemiological association between lung cancer and chronic obstructive pulmonary disease (COPD), a chronic inflammatory respiratory disease, is well known, limited studies have examined the association between lung cancer and non-cystic fibrosis bronchiectasis, a representative chronic airway inflammatory disease. This study evaluated the association between bronchiectasis and lung cancer in patients with COPD.
Methods: A matched case–control study was conducted in a referral hospital in South Korea. Among COPD patients with moderate to very severe airflow limitation (forced expiratory volume in one second/forced vital capacity <0.7 and forced expiratory volume in one second ≤70% [% predicted]) who underwent chest computed tomography (CT) between January 1, 2010 and May 30, 2013, patients with lung cancer and controls matched for age, sex, and smoking history were selected. The risk of lung cancer was assessed according to the presence of underlying bronchiectasis confirmed by chest CT.
Results: The study enrolled 99 cases and 198 controls. Combined bronchiectasis on chest CT was inversely associated with the risk of lung cancer compared with controls (odds ratio [OR] 0.25, 95% confidence interval [CI] 0.12–0.52, P<0.001). Significant associations were found in patients with squamous cell carcinoma (OR 0.11, 95% CI 0.03–0.49, P=0.001) and history of smoking (OR 0.27, 95% CI 0.12–0.57, P<0.001). However, the severity and location of bronchiectasis were not associated with the risk of lung cancer.
Conclusion: Interestingly, the concomitant presence of bronchiectasis in COPD patients was associated with a lower risk of lung cancer.

Keywords: bronchiectasis, lung cancer, chronic inflammation, COPD

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