Question
The resected specimen of a kidney is seen below. What is the diagnosis?
| A. |
Acute post-streptococcal glomerulonephritis
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| B. |
Flea-bitten kidney of malignant hypertension
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| C. |
Chronic glomerulonephritis
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| D. |
Amyloidosis
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Show Answer
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Correct Answer � B
Explanation
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Ans: B. Flea-bitten kidney of malignant hypertension
- The image is typically showing a flea-bitten kidney that is a granular kidney with multiple petechial spots. Flea bitten kidney is a descriptive term referring to the petechial hemorrhages and micro infarctions on the renal cortical surface, typical of malignant hypertension, which are caused by thrombosis in the arcuate and interlobular arteries.
- The kidney size varies depending on the duration and severity of the hypertensive disease.
- Small, pinpoint petechial hemorrhages may appear on the cortical surface from rupture of arterioles or glomerular capillaries, giving the kidney a peculiar ‘flea-bitten” appearance.
