Which type of aneurysm is characterized by localized dilation and may lead to rupture if not monitored effectively?

A saccular aneurysm is characterized by a localized dilation that typically appears as a round bulge on one side of an artery. This type of aneurysm is often formed due to a weakness in the vessel wall, leading to an outpouching. If it is not monitored effectively, there is a significant risk of rupture, which can result in severe internal bleeding and requires immediate medical intervention.

The nature of a saccular aneurysm—specifically its shape and location—makes it particularly susceptible to complications. Monitoring these aneurysms is critical as they can grow over time and thus necessitate regular imaging and surveillance in order to assess the risk of rupture.

Other forms of aneurysms, such as fusiform aneurysms, involve a more generalized dilation that encircles the entire circumference of the blood vessel, and while they can also be dangerous, they present different risk profiles and management strategies. Dissecting aneurysms involve a tear in the artery wall that creates a separate channel for blood to flow, resulting in a different clinical situation. Thoracic aneurysms refer to aneurysms that occur in the thoracic region of the aorta, and while they can be serious, the term encompasses various types, including