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Bronchiectasis is a very heterogeneous disease. This heterogeneity has several consequences: severity cannot be measured by a single variable, so multidimensional scores have been developed to capture it more broadly. Some groups of patients with similar clinical characteristics or prognoses (clinical phenotypes), and even similar inflammatory profiles (endotypes), have been identified, and these have been shown to require a more specific treatment. We comment on this ‘stratified’ model of medicine as an intermediate step toward the application of the usual concepts on which precision medicine is based (such as cellular, molecular or genetic biomarkers, treatable traits and individual clinical fingerprinting), whereby each subject presents certain specific characteristics and receives individualized treatment. True precision or personalized medicine is based on concepts that have not yet been fully achieved in bronchiectasis, although some authors are already beginning to adapt them to this disease in terms of pulmonary and extrapulmonary etiologies, clinical fingerprinting (specific to each individual), cellular biomarkers such as neutrophils and eosinophils (in peripheral blood) and molecular biomarkers such as neutrophil elastase. In therapeutic terms, the future is promising, and some molecules with significant antibiotic and anti-inflammatory properties are being developed.

The role of precision medicine in bronchiectasis: emerging data and clinical implications