What renal vascular change is classically seen with long-standing hypertension?

What renal vascular change is classically seen with long-standing hypertension?

• A. Hyaline arteriolosclerosis of afferent and efferent arterioles with striped renal scarring
• B. Fibrinoid necrosis with onion-skin arteriolosclerosis
• C. Hyperplastic arteriolosclerosis with arteriolar dilation
• D. Atheroembolic occlusion of arcuate arteries

Answer: (A)

Chronic hypertension causes arteriolar hyalinosis in the kidney. The persistent elevated pressure damages the small renal vessels, leading to leakage of plasma proteins into the arteriolar walls and increased deposition of matrix in the smooth muscle layer. This creates hyaline thickening and narrowing of both the afferent and efferent arterioles, reducing renal blood flow and causing ischemic injury to glomeruli and the interstitium. Over time, this ischemia results in progressive glomerulosclerosis and interstitial fibrosis, producing striped (patchy) renal scarring that reflects chronic ischemic nephrosclerosis. This pattern is the classic vascular change seen with long-standing hypertension. In contrast, fibrinoid necrosis with onion-skin arteriolosclerosis is characteristic of malignant hypertension, not the typical long-standing form. Hyperplastic arteriolosclerosis can involve concentric smooth muscle proliferation (onion-skinning) but isn’t described as arteriolar dilation, and atheroembolic occlusion of arcuate arteries points to embolic disease rather than the chronic hypertensive arteriolar changes.

Chronic hypertension causes arteriolar hyalinosis in the kidney. The persistent elevated pressure damages the small renal vessels, leading to leakage of plasma proteins into the arteriolar walls and increased deposition of matrix in the smooth muscle layer. This creates hyaline thickening and narrowing of both the afferent and efferent arterioles, reducing renal blood flow and causing ischemic injury to glomeruli and the interstitium. Over time, this ischemia results in progressive glomerulosclerosis and interstitial fibrosis, producing striped (patchy) renal scarring that reflects chronic ischemic nephrosclerosis. This pattern is the classic vascular change seen with long-standing hypertension.

In contrast, fibrinoid necrosis with onion-skin arteriolosclerosis is characteristic of malignant hypertension, not the typical long-standing form. Hyperplastic arteriolosclerosis can involve concentric smooth muscle proliferation (onion-skinning) but isn’t described as arteriolar dilation, and atheroembolic occlusion of arcuate arteries points to embolic disease rather than the chronic hypertensive arteriolar changes.