Understanding COPD: Emphysema, Chronic Bronchitis, and Asthma Overlap #67652 (License: Personal Use)

The image presents a three-circle Venn diagram where “COPD” is centrally positioned at the intersection of emphysema (blue), chronic bronchitis (red), and asthma (green). Each condition occupies its own labeled circle, with overlapping regions indicating shared features or co-occurrence. This visual clarifies that while COPD is commonly associated with emphysema and chronic bronchitis, asthma can also contribute to or coexist with COPD, especially in certain phenotypes like asthma-COPD overlap syndrome (ACOS).

Used in medical education, patient brochures, and clinical websites to explain the complex relationship among obstructive lung diseases; targets users seeking to understand COPD diagnosis, classification, or differential diagnosis.