Acute intermittent ischemia is generally caused by altered vasomotion and rarely by aortic dissection. There is reported a case of dissection of the abdominal aorta which presented a mixoid degeneration of the inner wall. The surgical finding was similar to a medio intimal aortic cylinder obtained generally during endarterectomy. Five years after the operation (endarterectomy of the mixoid cylinder) the patient presents a good patency of the aortoiliac area.