**Core Concept**
Granular contracted kidneys refer to a condition where the kidneys are shrunken, with a granular surface due to chronic damage and scarring. This condition can result from various causes, including long-standing hypertension, diabetes, and chronic pyelonephritis.
**Why the Correct Answer is Right**
The correct answer is a condition that does not lead to granular contracted kidneys. Chronic kidney disease (CKD) due to diabetes is a classic cause of granular contracted kidneys. In diabetes, prolonged high blood sugar levels damage the blood vessels and nerves of the kidneys, leading to chronic inflammation and scarring. Over time, this can result in the characteristic granular contracted appearance of the kidneys.
**Why Each Wrong Option is Incorrect**
**Option A:** Chronic pyelonephritis is a cause of granular contracted kidneys due to recurrent or persistent kidney infections, leading to chronic inflammation and scarring.
**Option B:** Hypertension is a well-known cause of granular contracted kidneys due to the long-term effects of high blood pressure on the blood vessels and tissues of the kidneys.
**Option C:** Analgesic nephropathy is a cause of granular contracted kidneys due to the chronic use of certain pain medications, such as NSAIDs, which can damage the kidneys and cause chronic inflammation and scarring.
**Clinical Pearl / High-Yield Fact**
Remember that granular contracted kidneys are often seen in patients with a long history of uncontrolled hypertension or diabetes, and are a sign of advanced kidney disease.
**Correct Answer: D.**
Free Medical MCQs Β· NEET PG Β· USMLE Β· AIIMS
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