Related Experiment Video
Updated: Jan 17, 2026

Author Spotlight: Investigating the Key Factors of Obliterative Bronchiolitis After Lung Transplantation
Published on: November 10, 2023
Airway overlap syndromes with asthma.
Carlos Amado1, Daniel Lopez-Padilla2, Raúl Méndez3
1Respiratory Department, Hospital Universitario Marqués de Valdecilla, Santander, Spain; Medicine Department, Universidad de Cantabria, Santander, Spain; Instituto de investigación IDIVAL, Santander, Spain.
Recognizing overlap syndromes in airway diseases like asthma, COPD, bronchiectasis, and obstructive sleep apnea is crucial. These interconnected conditions significantly impact patient management and prognosis, requiring integrated treatment approaches.
Area of Science:
- Respiratory Medicine
- Pulmonology
- Clinical Science
Background:
- Airways are sites for inflammatory diseases like asthma, COPD, bronchiectasis, and OSA.
- High prevalence leads to frequent co-occurrence of these conditions in patients.
- Pathophysiological links exist between these diseases, creating 'overlap syndromes'.
Purpose of the Study:
- To define and discuss the concept of overlap syndromes in airway diseases.
- To highlight the bidirectional pathophysiological interactions between conditions like asthma, COPD, bronchiectasis, and OSA.
- To emphasize the clinical significance of recognizing these syndromes for patient care.
Main Methods:
- Review of existing literature on inflammatory airway diseases.
- Analysis of epidemiological data on co-occurrence of asthma, COPD, bronchiectasis, and OSA.
- Discussion of identified pathophysiological connections and their clinical implications.
Main Results:
- Overlap syndromes, particularly those involving asthma (e.g., asthma-COPD overlap), are common.
- Bidirectional interactions exist: asthma can worsen COPD, OSA, and bronchiectasis; conversely, COPD, bronchiectasis, and OSA can negatively impact asthma.
- These interactions influence disease prevalence, management, and prognosis.
Conclusions:
- Recognizing overlap syndromes is essential for effective clinical practice.
- An integrated, individualized approach is necessary for optimal diagnosis and treatment.
- Considering the coexistence of multiple airway diseases improves patient outcomes and prognosis.
Related Concept Videos
Asthma-II: Pathophysiology and Classification
Additionally, environmental and genetic factors play crucial roles in determining an individual's susceptibility to asthma and the severity of their condition.
Critical processes in asthma pathophysiology include:
Asthma-I: Introduction
Asthma: Pathogenesis and Management
Asthma is classified as allergic and non-allergic. Allergens such as dust mites, pollen, and pet dander trigger allergic asthma, while factors like cold air, intense emotions, or exercise can induce non-allergic asthma.
Breathing
Other Pulmonary Disorders
Asthma-III: Symptoms and Complications
Classification of Asthma

