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As long as the artery enlarges sufficiently to compensate for the extra thickness of the atheroma, then no narrowing ("stenosis") of the opening ("lumen") occurs. The artery expands with an egg-shaped cross-section, still with a circular opening. If the enlargement is beyond proportion to the atheroma thickness, then an aneurysm is created. [71]
An atheroma, or atheromatous plaque, is an abnormal accumulation of material in the inner layer of an arterial wall. [ 1 ] [ 2 ] The material consists of mostly macrophage cells , [ 3 ] [ 4 ] or debris, containing lipids , calcium and a variable amount of fibrous connective tissue .
Hepatic artery thrombosis is the most common complication that occurs after liver transplantation. [2] Hepatic artery thrombosis may also occur after other surgeries. [ 2 ] Hepatic artery thrombosis and primary non-function are the two most common reason that a transplanted liver fails to work (graft failure). [ 3 ]
Portal vein thrombosis affects the hepatic portal vein, which can lead to portal hypertension and reduction of the blood supply to the liver. [6] It usually happens in the setting of another disease such as pancreatitis , cirrhosis , diverticulitis or cholangiocarcinoma .
Arteriosclerosis, literally meaning "hardening of the arteries", is an umbrella term for a vascular disorder characterized by abnormal thickening, hardening, and loss of elasticity [3] of the walls of arteries; [4] this process gradually restricts the blood flow to one's organs and tissues and can lead to severe health risks brought on by atherosclerosis, which is a specific form of ...
Progression of atherosclerosis. A fatty streak is the first grossly visible (visible to the naked eye) lesion in the development of atherosclerosis.It appears as an irregular yellow-white discoloration on the luminal surface of an artery.
Portal vein thrombosis, incidental PM finding. Portal vein thrombosis (PVT) is a vascular disease of the liver that occurs when a blood clot occurs in the hepatic portal vein, which can lead to increased pressure in the portal vein system and reduced blood supply to the liver.
Generally an atheroma becomes vulnerable if it grows more rapidly and has a thin cover separating it from the bloodstream inside the arterial lumen. Tearing of the cover is called plaque rupture. However, a repeated atheroma rupture and healing is one of the mechanisms, perhaps the dominant one, that creates artery stenosis.