Abstract A series of 100 consecutive cases of aneurysm of the abdominal aorta is reported. The results are analyzed and observations on the development of the operation, pathologic changes of the lesion, indications for operation, problems in operative technic, prosthesis of choice and venous anomalies encountered are made. There were sixty-six nonruptured and thirty-four ruptured aneurysms in our series with an operative mortality of 15 per cent in the former and 59 per cent in the latter, with a combined figure of 30 per cent. Seven patients have died since operation, and an additional seven have been lost to follow-up study. Fifty-six patients are living and enjoying normal lives seven years following surgery.