What is a fusiform aneurysm?

A fusiform aneurysm is a localized dilation or ballooning of an artery that occurs over a relatively long segment compared to its diameter. Unlike a saccular aneurysm, which forms an outpouching at a specific location, a fusiform aneurysm involves a more diffuse widening of the arterial wall. These aneurysms typically affect larger arteries with atherosclerosis or other systemic conditions affecting the arterial structure.