Morphology - concentric, onion skin thickening of walls of arterioles
Clinical significance - associated with malignant or accelerated hypertension
Pathogenesis - vasoconstriction
Hyperplastic Arteriolosclerosis. The renal artery at left has a concentric,
Kidney in malignant hypertension. It is atrophic, has irregular small infarcts, and a
more coarsely irregular cortical surface than in the arterionephrosclerosis seen earlier.