RT Journal Article SR Electronic T1 Acute exacerbations of chronic obstructive pulmonary disease: in search of diagnostic biomarkers and treatable traits JF Thorax JO Thorax FD BMJ Publishing Group Ltd and British Thoracic Society SP 520 OP 527 DO 10.1136/thoraxjnl-2019-214484 VO 75 IS 6 A1 Alexander G Mathioudakis A1 Wim Janssens A1 Pradeesh Sivapalan A1 Aran Singanayagam A1 Mark T Dransfield A1 Jens-Ulrik Stæhr Jensen A1 Jørgen Vestbo YR 2020 UL http://thorax.bmj.com/content/75/6/520.abstract AB Acute exacerbations of chronic obstructive pulmonary disease (COPD) are associated with a significant mortality, health and economic burden. Their diagnosis, assessment and management remain suboptimal and unchanged for decades. Recent clinical and translational studies revealed that the significant heterogeneity in mechanisms and outcomes of exacerbations could be resolved by grouping them etiologically. This is anticipated to lead to a better understanding of the biological processes that underlie each type of exacerbation and to allow the introduction of precision medicine interventions that could improve outcomes. This review summarises novel data on the diagnosis, phenotyping, targeted treatment and prevention of COPD exacerbations.