Which of the following statement about light microscopy finding in minimal change disease is TRUE?
**Core Concept**
Minimal change disease (MCD) is a type of nephrotic syndrome characterized by the loss of foot processes of the podocytes in the glomeruli, as seen under electron microscopy. However, under light microscopy, the glomeruli appear normal.
**Why the Correct Answer is Right**
The hallmark of minimal change disease is the normal appearance of the glomeruli under light microscopy. This is because the changes occur at the level of the podocytes and the foot processes, which cannot be visualized under light microscopy. The normal appearance of the glomeruli can make it challenging to diagnose MCD, and a renal biopsy is often required to confirm the diagnosis.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because the presence of mesangial proliferation is more characteristic of IgA nephropathy or other types of glomerulonephritis.
**Option B:** This option is incorrect because the presence of crescents is more characteristic of rapidly progressive glomerulonephritis.
**Option C:** This option is incorrect because the presence of sclerotic glomeruli is more characteristic of chronic kidney disease or other types of glomerulosclerosis.
**Clinical Pearl / High-Yield Fact**
It's essential to remember that the diagnosis of minimal change disease is often made based on the clinical presentation and the exclusion of other causes of nephrotic syndrome, rather than the histological findings alone.
**Correct Answer: C. Normal glomeruli.**