False statement regarding aneurysms is -

An aneurysm is an outward bulging, likened to a bubble or balloon, caused by a localized, abnormal, weak spot on a blood vessel wall. leading to uncontrolled bleeding. Although they may occur in any blood vessel, paicularly lethal examples include aneurysms of the Circle of Willis in the brain, aoic aneurysms affecting the thoracic aoa, and abdominal aoic aneurysms. Aneurysms can arise in the hea itself following a hea attack, including both ventricular and atrial septal aneurysms. There are three types of aneurysms: abdominal aoic, thoracic aoic, and cerebral. Abdominal aoic aneurysms, sometimes known as "Triple A," are the most common aneurysms of the aoa - the large blood vessel that carries blood away from your hea and through your body. The three major types of true intracranial aneurysms are as follows: Saccular aneurysms - Degenerative or developmental; traumatic; mycotic; oncotic; flow-related; vasculopathy-related; and drug-related. Fusiform aneurysms. Dissecting aneurysms Saccular aneurysms, also called "berry" aneurysms because they look like berries, are the most common type of brain aneurysm. Saccular aneurysms have a "neck" that connects the aneurysm to its main ("parent") aery and a larger, rounded area called the dome. These aneurysms bulge on only one side of the aery wall. Ref Davidson 23rd edition pg 445