Demirturk M, et al. - In this study, hereditary angioedema (HAE) patients were scrutinized for levels of endocan and vascular cell adhesion molecules (VCAM) in their peripheral blood samples, with an intent to investigate endothelial activation in attack-free periods. Findings indicated that increased endocan and VCAM-1 levels may reflect an endothelial activation even in attack-free periods in HAE patients.