Aortic Aneurysm, Abdominal


MSH: An abnormal balloon- or sac-like dilatation in the wall of the ABDOMINAL AORTA which gives rise to the visceral, the parietal, and the terminal (iliac) branches below the aortic hiatus at the diaphragm.,NCI: Enlargement and ballooning of the vessel that supplies arterial blood to the abdomen, pelvis and legs.

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