Most common cause of Abdominal aneurysm is:

Answer is A (Atherosclerosis) Atherosclerosis is the major etiological factor in abdominal aoic aneurysm - Robbins Remember: Atherosclerotic aneurysms most frequently occur in the Abdominal aoa.Q Most common site of abdominal aoic aneurysm is above the bifurcation of aoa and below the renal aeries.Q Most common age group for abdominal aoic aneurysm depends is elderly(> 50 years). Risk' of rupture of an abdominal aoic aneurysm depends upon its size (aneurysm larger than 5 cm are classified as dangerousQ) Most common source of infection in a Mycotic abdominal aoic aneurysm is Bacteremia Q from a primary Salmonella gastro-enteritis.Q (Mycotic aneurysm are abdominal aoic aneurysm that have become infected by lodgment of circulating organisms in the wall)