What is Bronchiectasis

Bronchiectasis is a chronic lung condition characterized by the permanent enlargement and damage of the airways, which impairs the lung's ability to clear mucus effectively.

In a healthy respiratory system, the bronchial tubes are flexible and clear mucus out of the lungs to prevent infection. In bronchiectasis, these airways become thickened, scarred, and widened. Because the lungs cannot move mucus properly, bacteria become trapped, leading to frequent cycles of infection and inflammation that further damage the bronchial walls.

Systems Affected and Pathophysiology

While bronchiectasis primarily affects the respiratory system, the chronic inflammation can place stress on the cardiovascular system. The underlying mechanism typically involves a "vicious cycle" where airway injury leads to poor mucus clearance, which triggers colonization by bacteria (such as Pseudomonas aeruginosa), causing recurrent infections that perpetuate the airway damage.

Classifications and Prevalence

Bronchiectasis is generally classified into two main categories: Cystic Fibrosis (CF)-related and non-CF bronchiectasis. While it was once considered rare, better imaging (high-resolution CT scans) has led to increased recognition of the disease. Prevalence varies significantly by geography and socioeconomic factors, with estimates ranging from 50 to 500 per 100,000 individuals globally.

Who is Affected?

The condition can affect anyone, but it is more commonly diagnosed in women and in individuals over the age of 60. While it can develop after a severe lung infection in childhood, many cases are diagnosed later in life. It is important to distinguish bronchiectasis from chronic obstructive pulmonary disease (COPD) or asthma; while they share symptoms like chronic cough, bronchiectasis is specifically defined by the anatomical dilation of the airways, whereas COPD is typically characterized by airflow obstruction.

Disclaimer: This information is for educational purposes and does not constitute medical advice, diagnosis, or treatment. Always seek the advice of your physician or other qualified health provider with any questions you may have regarding a medical condition.

References

• NIH Genetic and Rare Diseases Information Center (GARD): Bronchiectasis


• Orphanet: Bronchiectasis (excluding cystic fibrosis)


• European Lung Foundation: Bronchiectasis Patient Priorities