• occurs
  • Atherosclerosis occurs when fat and other substances build up on the lining of a blood vessel, increasing your risk of an aneurysm. (wikipedia.org)
  • fibrosis
  • IAA is closely associated and believed to be a response to and extensive peri-anuerysmal fibrosis, which is the formation of excess fibrous connective tissue in an organ or tissue in a reparative or reactive process IAA accounts for 5-10% of aortic aneurysms. (wikipedia.org)