For that purpose, several approaches will be used to reach this aim: (1) To evaluate the degree of modification of matrix components at the aneurysmal wall by biological and histological studies (concentrations of PTMDPs (homocitrulline, carboxymethyllysine, pentosidine and MG-H1) and expression of RAGE) ; (2) To determine if there is a link between tissue concentrations of PTMDPs and the severity of the aneurysmal pathology ; (3) To compare concentrations of PTMDPs obtained at the aneurysmal wall with those obtained in skin and serum ; (4) To establish a link between concentrations of PTMDPs (in serum, skin and vascular wall), fragmentation of elastin and different haematological parameters potentially involved in the development of the pathology aneurysmal.