<prompt> The characteristic feature of benign nephrosclerosis isLeather grain appearanceFlea bitten kidneyOnion skin appearanceHyperplastic aeriosclerosis  <response>: Benign nephrosclerosis Malignant nephrosclerosisAge group Elderly Younger individuals Gross Grain leather appearance-Fine granularity over coical surfaceFlea bitten appearance-Pinpoint petechial hemorrhage over coical surfaceMicroscopyHyaline aeriosclerosis, subcapsular scars Fibrinoid necrosis and onion skinning appearance of aeriolesClinical features Mild proteinuria. GFR normal Renal failure, BP 200120,papilloedema, retinal hemorrhages and encephalopathy Ref: Robbins 8e p949 