Abdominal aortic aneurysms frequently contain what poorly organized structure?

Abdominal aortic aneurysms frequently contain what poorly organized structure?

• A. Mural thrombus
• B. Atheromatous plaque
• C. Laminar clot
• D. Calcified plaque

Answer: (A)

Abdominal aortic aneurysm sacs promote stasis and turbulent flow, leading to formation of a mural thrombus along the inner wall. This clot is typically poorly organized, mainly composed of fibrin and platelets with red cells, and remains adherent to the wall rather than evolving into well-structured fibrous tissue. It’s this intraluminal wall-adjacent thrombus that is characteristically seen in aneurysms. In contrast, atheromatous plaque consists of lipid-rich debris within the arterial wall and calcified plaques reflect advanced atherosclerosis—not the intraluminal content of the aneurysm sac.

Abdominal aortic aneurysm sacs promote stasis and turbulent flow, leading to formation of a mural thrombus along the inner wall. This clot is typically poorly organized, mainly composed of fibrin and platelets with red cells, and remains adherent to the wall rather than evolving into well-structured fibrous tissue. It’s this intraluminal wall-adjacent thrombus that is characteristically seen in aneurysms. In contrast, atheromatous plaque consists of lipid-rich debris within the arterial wall and calcified plaques reflect advanced atherosclerosis—not the intraluminal content of the aneurysm sac.