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Splanchnic arteries aneurysmatic pathology is rare, even if, in the last decades it has been noticed an increase of its incidence, owing to the worldwide use of the recent diagnostic tools as ecography, TC, MR and angiography. Among visceral aneurysms those of the superior mesenteric artery (SMA) range the 5,5 – 8%. In the majority of cases SMA aneurysms are of mycotic etiology (60%), of atherosclerotic ones are less frequent, even if their incidence has increased in the last decades. Other causes are exceptional. Dimensions are generally moderate (1-3 cm.), yet aneurysms of a significant diameter, ranging from 4 to 8 cm., are reported in the most recent literature