The nephrotic syndrome is the most common chronic renal disease of childhood.Materials and Methods: In this study the clinical course, risk factors for relapse and the predictors of long-term outcome of 502 patients (median age 5 years)with primary nephrotic syndrome were followed for an average of 60 months (3.5 to 240 months) from 1981 to 2000.Results: Among the 502 patients 5 (1%) achieved s...