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The Worldwide Puzzle of Bronchiectasis Etiology in Adults
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Miguel Angel Martinez-Garcia1,*, Timothy Aksamit2, Takanori Asakura3, Lucy Burr4, Chang Chia-Ling5, Rosa Maria Giron6, Wei-jie Guan7, Deniz Kizilirmak8, Yeon-Mok Oh9, Miguel Penizzotto10, Felix C Ringshausen11, Anthony de Soyza12, Christina Thornton13, Conroy Wong14
1 Respiratory Deparment. University and Polytechnic La Fe Hospital, Valencia, Spain
2 Pulmonary Disease and Critical Care Medicine, Mayo Clinic, Rochester, MN, USA
3 Division of Pulmonary Medicine, Department of Medicine, Keio University School of Medicine, Tokyo, Japan
4 Mater misericordiae Ltd, Mater research institute -universtiy of Queensland, Brisbane, Australia
5 Department of Internal Medicine, National Taiwan University Hospital Hsin-Chu Branch, Hsin-Chu, Taiwan
6 Respiratory Deparment. Universitaria Hospital La Princesa, Madrid, Spain
7 Department of Allergy and Clinical Immunology, Department of Respiratory and Critical Care Medicine, State Key Laboratory of Respiratory Disease, National Clinical Research Center for Respiratory Disease, National Center for Respiratory Medicine, Guangzhou Institute of Respiratory Health, The First Affiliated Hospital, Guangzhou Medical University, Guangzhou, Guangdong, P.R, China
8 Pulmonology Department. Manisa Celal Bayar University, Faculty of Medicine, Manise, Turkey
9 Department of Pulmonary and Critical Care Medicine,Asan Medical Center, University of Ulsan College of Medicine, Seoul, South Korea
10 Sanatorio San Roque, Curuzú Cuatiá, Corrientes, Argentina
11 Department of Respiratory Medicine and Infectious Diseases, Hannover Medical School, Hannover, Germany; Biomedical Research in Endstage and Obstructive Lung Disease Hannover, German Center of Lung Research, Hannover, Germany; European Reference Network on Rare and Complex Respiratory Diseases, Frankfurt, Germany
12 Population and Helath Science Institite, Newcastle University, United Kingdom
13 Departments of Medicine and Microbiology, Immunology and Infectious Diseases, University of Calgary, Calgary, Alberta, Canada
14 Respiratory Department, Te Whatu Ora Counties Manukau, Auckland, New Zealand. Faculty of Medical and Health Sciences, University of Auckland, Auckland, New Zealand
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ABSTRACT

Bronchiectasis represents in frequency the third chronic inflammatory airway disease after chronic obstructive pulmonary disease (COPD) and asthma. It is produced by more than one hundred causes, both pulmonary and extrapulmonary. Despite advances in recent years in the understanding of this condition and the publication of several national and international guidelines on its management, in most cases the etiology remains unknown. Among the identified etiological forms, post-infectious and post-tuberculous are the most frequent. It is also striking how bronchiectasis associated with COPD and severe asthma has been progressively increasing over the years, probably due to greater awareness among healthcare professionals of the importance of such associations and the wider use of chest computed tomography (the diagnostic method of choice for bronchiectasis from a radiological perspective). However, it is remarkable, according to data obtained from national and international bronchiectasis registries, the considerable geographic heterogeneity in their etiology. Thus, in socially disadvantaged regions or in those with poorer healthcare access, post-infectious and particularly post-tuberculous forms clearly predominate. It is always necessary to perform the appropriate complementary tests, as highlighted in all bronchiectasis guidelines, to exclude at least the treatable etiologies (treatable trait), since this is undoubtedly associated with a better patient prognosis.

Keywords:
Bronchiectasis
registry
etiology
infection
COPD
asthma
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