Not a feature of Minimal change disease:
**Minimal Change Disease**
**Core Concept**
Minimal change disease (MCD) is a common cause of nephrotic syndrome in children, characterized by the loss of foot processes of podocytes on electron microscopy. It is a disease of the glomerular filtration barrier, where the glomerular basement membrane remains intact, but the foot processes of podocytes are effaced, leading to massive proteinuria.
**Why the Correct Answer is Right**
The correct answer is related to the fact that minimal change disease is not associated with any significant changes in the glomerular structure, including the absence of crescents, sclerosis, or inflammation. The disease is also characterized by the lack of immune deposits on immunofluorescence microscopy, which distinguishes it from other causes of nephrotic syndrome. The pathophysiology of MCD is thought to be related to the disruption of the slit diaphragm, leading to the loss of negative charge on the glomerular basement membrane.
**Why Each Wrong Option is Incorrect**
**Option A:** This is incorrect because heavy proteinuria is a hallmark of minimal change disease, which is characterized by massive loss of albumin in the urine.
**Option B:** This is incorrect because minimal change disease is not associated with significant changes in the glomerular structure, including the absence of crescents, sclerosis, or inflammation.
**Option C:** This is incorrect because minimal change disease is not associated with immune deposits on immunofluorescence microscopy, which distinguishes it from other causes of nephrotic syndrome.
**Clinical Pearl / High-Yield Fact**
A key clinical feature of minimal change disease is the rapid response to corticosteroid therapy, with most patients experiencing complete remission within 2-4 weeks of treatment. This is in contrast to other causes of nephrotic syndrome, which may require longer periods of treatment or more aggressive immunosuppressive therapy.
**Correct Answer:** C.