Figure 4.

Endobronchial mucosal microvasculature in COPD and controls.

Notes: (A) Distribution of CD34 among COPD patients and healthy controls; (B) a section through the bronchial lamina propria shows high microvascular density in a control subject (anti-CD34, ×400); (C) shows low microvascular density in a COPD patient as highlighted by CD34 endothelial immunostaining (anti-CD34, ×400); and (D) ROC curve to evaluate angiogenesis between COPD patients and healthy controls.

Abbreviation: ROC, receiver operating characteristic.