“…Other risk factors are some familial syndromes (neurofibromatosis, Maffucci syndrome and Klippel-Trenaunay syndrome), exposure to toxins (vinylchloride, thorium dioxide, arsenic, anabolic steroids) and f oreign substances (accidentally retained surgical gauzes, vascular and orthopaedic prostheses and gouty tophus). A correlation between vascular grafts and aneurysms on the site of the graft has also been suggested in literature (4)(5)(6)(7)(8)(9)(10)(11)(12)(13).…”