Rupture of fusiform aneurysms, especially those located in the posterior circulation, is often lethal, despite aggressive treatment.

Is a fusiform aneurysm a true aneurysm?

An aneurysm can be characterized by its location, shape, and cause. The shape of an aneurysm is described as being fusiform or saccular, which helps to identify a true aneurysm. The more common fusiform-shaped aneurysm bulges or balloons out on all sides of the blood vessel.

Where is fusiform aneurysm?

Fusiform aneurysms are defined as circumferential dilations of an intracranial artery without an ostium or neck. They are commonly located in the posterior circulation, especially the vertebral artery (VA), basilar artery (BA), and posterior cerebral artery (PCA).

What does fusiform aneurysm mean?

Fusiform aneurysm: An outpouching or widening of an artery or a vein that is shaped like a spindle.

What is fusiform aneurysm?

Where is a thoracic aneurysm?

A thoracic aortic aneurysm is a weakened area in the upper part of the aorta — the major blood vessel that feeds blood to the body. Aneurysms can develop anywhere in the aorta. A thoracic aortic aneurysm is a weakened area in the major blood vessel that feeds blood to the body (aorta).

What do you mean by fusiform?

Fusiform means having a spindle-like shape that is wide in the middle and tapers at both ends. It is similar to the lemon-shape, but often implies a focal broadening of a structure that continues from one or both ends, such as an aneurysm on a blood vessel.

What is fusiform dilation?

A fusiform (or true) aneurysm has a uniform shape with a symmetrical dilatation that involves the entire circumference of the aortic wall. A saccular aneurysm is a localized outpouching of the aortic wall, and it is the shape of a pseudoaneurysm. For patient education resources, see Aortic Aneurysm.

What is the primary cause of fusiform aneurysms?

Dissection has been proposed as the main underlying cause of fusiform aneurysms and most commonly involves the posterior circulation, especially vertebral and basilar arteries1,3,5-10,15,16,19,20,24-26,32,35) However, typical cases of dissecting aneurysm in the posterior circulation were excluded in this study.

What are fusiform intracranial aneurysms?

Fusiform intracranial aneurysms are a type of intracranial aneurysms with an elongated fusiform shape caused by atherosclerotic disease most common in the vertebrobasilar circulation. They can be incidental or asymptomatic, discovered during work-up for unrelated symptoms.

What are the different types of brain aneurysms?

Also known as a berry aneurysm (because it resembles a berry hanging from a vine), this is the most common form of cerebral aneurysm. It is typically found on arteries at the base of the brain. Saccular aneurysms occur most often in adults. Fusiform aneurysm . A fusiform aneurysm balloons or bulges out on all sides of the artery. Mycotic aneurysm .

What is the difference between fusiform and mycotic aneurysm?

A fusiform aneurysm balloons or bulges out on all sides of the artery. Mycotic aneurysm . A mycotic aneurysm occurs as the result of an infection that can sometimes affect the arteries in the brain. The infection weakens the artery wall, causing a bulging aneurysm to form.

What percentage of intracranial aneurysms are saccular?

The saccular type accounts for 90% of intracranial aneurysms, thus, it will be the focus of this review.