Arterial aneurysm Cross-section of an arterial aneurysm, showing most of the area consisting of organized mural thrombus (tan-brown area) An aneurysm is an outward bulging, likened to a bubble or balloon, caused by a localized, abnormal, weak spot on a blood vessel wall. https://t.me/joinchat/AAAAAEIMp_P_-52SlidzHg