Childhood nephrotic syndrome can occur at any age but is most common between the ages of 1 1/2 and 5 years. It seems to affect boys more often than girls.
A child with nephrotic syndrome has these signs:
Nephrotic syndrome is not itself a disease. But it can be the first sign of a disease that damages the kidney's tiny blood-filtering units, called glomeruli, where urine is made.
Sources
National Kidney and Urologic Diseases Information Clearinghouse