Shrinking lung/ kidney is seen in: March 2012
**Core Concept**
Shrinking lung or kidney syndrome, also known as tubular dysfunction, is a condition characterized by a decrease in the size of the affected organ due to a reduction in the amount of tubular fluid reabsorbed. This occurs in the setting of tubular injury or dysfunction, leading to a decrease in the glomerular filtration rate (GFR) and a subsequent decrease in renal size.
**Why the Correct Answer is Right**
The correct answer is associated with the use of Non-Steroidal Anti-Inflammatory Drugs (NSAIDs), which can cause renal tubular injury and dysfunction. This leads to a decrease in the reabsorption of tubular fluid, resulting in a decrease in the size of the kidney. This mechanism is related to the inhibition of prostaglandin synthesis by NSAIDs, which is essential for maintaining renal blood flow and glomerular filtration rate.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect as it does not directly relate to the pathophysiology of shrinking lung or kidney syndrome. While it may be associated with renal dysfunction, it is not the primary cause of shrinking lung or kidney syndrome.
**Option B:** This option is incorrect as it is not directly related to the pathophysiology of shrinking lung or kidney syndrome. While it may be associated with renal dysfunction, it is not the primary cause of shrinking lung or kidney syndrome.
**Option C:** This option is incorrect as it is not directly related to the pathophysiology of shrinking lung or kidney syndrome. While it may be associated with renal dysfunction, it is not the primary cause of shrinking lung or kidney syndrome.
**Clinical Pearl / High-Yield Fact**
Shrinking lung or kidney syndrome is a classic example of a condition where the affected organ appears to "shrink" due to a decrease in tubular fluid reabsorption, rather than a decrease in the size of the organ itself. This condition is often associated with the use of NSAIDs and requires careful management to prevent further renal injury.
**Correct Answer: A. NSAIDs**