What kind of life expectatncy would you give a 75 year old who have inoperable aortic aneurysm.?

Why inoperable?: If bad heart, lungs, cancer etc. Those conditions may determine survival. Aneurysms may be in different parts of the aorta. But for abdominal: symptomatic and 6 cm survival about a year less and asymptomatic about 5 years as a good guess. Size, location and symptoms, and other risk factors are relevant to true answer!

Comorbidities: A 75 year old with an "inoperable" aortic aneurysm is likely too sick to undergo the operation rather than the aneurysm itself being "too difficult, " therefore, the survival of such a patient depends on that factor that makes him too sick. Plenty of studies have shown that most patients with aortic aneurysms will likely die of something other than the aortic aneurysm.