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Among the long-term complications that jeopardize bilateral aorto-femoral prostheses, the development of a false aneurysm on the aortic suture line, is indeed one of the most severe. Its frequency, approximately 1 p. cent of cases, is probably underestimated, since its diagnosis, with usual exploration methods, is difficult. The nuclear magnetic resonance (NMR) examination is here particularly indicated and, when in doubt, must be systematically requested, especially in the presence of a false aneurysm of the femoral suture line.

Aneurysm of the inferior mesenteric artery is rare. Often unrecognized unless complicated, it is, today, demonstrated by sonography or tomodensitometry and confirmed by angiography. Usually observed in patients with atheroma, it presents a mechanical origin secondary to a "jet disorder" phenomenon occurring in an artery with a hyper-output, responsible for almost the entire gastro-intestinal vascularization. The prevention of its dangerous complications (rupture or thrombosis) justifies a systematic procedure usually requiring, in addition to the excision of the aneurysm, a revascularization of the digestive arteries, as in the case presented here.

Polyaneurysmal dystrophy (PAD) is a strange disease. It is also an uncommon disease if only strict, arteriographic and pathological criteria, are considered. True varicose disease of the arteries, this disease develops slowly and its clinical manifestations, often severe, only occur in patients over 50. The frequent association with dolichomega arteries (DMA), especially at the aorto-iliac level, is certainly not accidental. A continuous dystrophy of the media would result in the occurrence of DAM; a segmental dystrophy these diseases under a single entity: ectatic mediadystrophy. Our small personal series of 9 cases is presented to analyse the course of this disease and specify its treatment.

In reference to a personal series of 100 partial interruptions of the inferior vena cava (74 clips, 11 Mobin-Uddin umbrellas, 15 Greenfiled's filters), the authors analyze the criteria of choice in various procedures where the mortality, morbidity and sequellae remain low. In light of these results, the current place of surgery in the prevention of pulmonary embolism is discussed, in cases where anticoagulant therapy is contraindicated, inadequate or has failed.