label: Pulmonary artery intimal thickening
label_lc: pulmonary artery intimal thickening
description: "Increased thickness of the intimal layer of the pulmonary artery. Throughout the pulmonary arterial tree, the thin intima consists of a non-fenestrated monolayer of endothelial cells lining the vessel lumen, as well as a sub-endothelial interstitium that extends to the internal elastic lamina. Intimal thickness in human lung ranges from 1-16% of total wall thickness. Pulmonary artery intimal thickening can be defined as a relative intima thickness to the thickness of the vessel wall of over 10%."