[Atherosclerotic aortic aneurysm (based on observations with the scanning electron microscope)].

The inner surface of the wall of atherosclerotic aneurism represented a sort of large ulcerative atherosclerotic plaque. Its individual areas were characterised by the presence of pseudo-hypertrophy of the endothelium cell nuclei, microplaques, and desorganization of the microrelief. The inner surface of the aneurism was de-endotheliolized on a considerable area, and here there were revealed deposits of lipids in the form of millet-like formations and smooth bodies. Studies of the inner surface of the aneurism wall carried out using raster-electron-microscopy technique made it possible to identify different types of calcinosis in the form of individual and isolated plates of calcium on its inner surface. Desorganization of the microrelief and de-endotheliation of the microrelief of the aneurism wall were the leading causes of parietal thromboformation.