<prompt> Cross section of an aeriole shows onion skin thickening of its wall. It is seen in:AtherosclerosisMedial calcific sclerosisHyaline aeriosclerosisHyperplastic aeriosclerosis  <response>: Hyperplastic aeriolosclerosis: Associated with malignant hypeension. It is a concentric, cellular thickening i.e., onion-skinning of the wall associated with fibrinoid necrosis.Atherosclerosis: Grossly recognizable atherosclerosis begins as a fatty streak and progresses to a fibroatheroma. Monckeberg medial calcification: A condition of little clinical significance because the changes are nonstenotic. It is characterized by medial calcification pipestem rigidity of the muscular aeries often radial and ulnar aeries in elderly men. Hyaline aeriolosclerosis: Associated with benign hypeension. It is eosinophilic, acellular thickening of the wall of aerioles. Ref: Wyatt C., Kemp W.L., Moos P.J., Burns D.K., Brown T.G. 2008. Chapter 9. Vascular Pathology. In C. Wyatt, W.L. Kemp, P.J. Moos, D.K. Burns, T.G. Brown Eds, Pathology: The Big Picture. 