There are three types of aneurysms:Cerebral aneurysms - They tend to occur in the brain above the aorta when the vessels weaken and form a bulge.Thoracic aortic aneurysms - They tend to develop in the part of the aorta that passes through the chest.Abdominal aortic aneurysms - They are the most common aneurysms of aorta known as “Triple-A”. When the blood pressure increases against the aorta’s wall, resulting in its rupture.