Hyperplastic arteriolitis with necrotizing arteriolitis is seen in?

Hyperplastic arteriolosclerosis is more typical of severe hypertension. Vessels exhibit "onion skin" ."concentric, laminated thickening of arteriolar walls and luminal narrowing . The lamination consists of smooth muscle cells and thickened , re duplicated basement membrane . In malignant hypertension these changes are accompnied by fibrinoid deposits and vessels wall necrosis .