Depends on size
Treatment of aortic aneurysms depend on size, symptoms, & associated medical problems of the patient.
Usually aneurysms less than 5 cm can be treated with observation. In a 93-year-old, age along with other medical problems must be taken into account to see if the benefits of surgery outweigh the risks. The best thing to do is to consult with a vascular surgeon who can help with this assessment.