**Question:** True about Nephrotic syndrome in a child -

A. It is a rare condition
B. It is usually caused by viral infections
C. Proteinuria is not a common finding in children
D. It is typically associated with minimal change disease

**Core Concept:** Nephrotic syndrome is a clinical syndrome characterized by the triad of severe proteinuria, hypoalbuminemia, hyperlipidemia, and oedema. In children, it is mostly caused by primary glomerular diseases, most commonly minimal change disease (MCD) and focal segmental glomerulosclerosis (FSGS).

**Why the Correct Answer is Right:** Nephrotic syndrome in a child is not a rare condition; it is a common renal disorder in childhood. It is typically caused by primary glomerular diseases, specifically minimal change disease (MCD) and focal segmental glomerulosclerosis (FSGS). Proteinuria is a key feature of nephrotic syndrome, and it is common in children with this condition.

**Why Each Wrong Option is Incorrect:**

A. False: Nephrotic syndrome is not a rare condition in children; it is a common renal disorder. Viral infections are not the primary cause of nephrotic syndrome but can sometimes exacerbate pre-existing nephrotic-range proteinuria.

B. False: Nephrotic syndrome in children is usually caused by primary glomerular diseases, such as minimal change disease (MCD) and focal segmental glomerulosclerosis (FSGS), rather than viral infections.

C. False: Proteinuria is a key feature of nephrotic syndrome and is common in children with this condition. Hypoalbuminemia and hyperlipidemia are more indicative of nephrotic syndrome than proteinuria itself.

D. True: Nephrotic syndrome is often associated with minimal change disease (MCD) and focal segmental glomerulosclerosis (FSGS), rather than viral infections. Viral infections can sometimes exacerbate pre-existing nephrotic-range proteinuria but are not the primary cause of nephrotic syndrome in children.

**Clinical Pearl:** A child presenting with nephrotic syndrome must be evaluated for primary glomerular diseases like minimal change disease (MCD) and focal segmental glomerulosclerosis (FSGS). Viral infections can exacerbate pre-existing nephrotic-range proteinuria; however, they are not the primary cause of nephrotic syndrome in children.