What disease would cause nephrotic syndrome?

Proper medication: Minimal change (or nil) disease. Correctly diagnosed by biopsy but frequently diagnosed by the symptoms of proteinuria, edema and intact renal function with a bland urine sediment. This responds to steroid therapy most of the time. The presence of blood in the urine, or failure to respond to steroids indicates need for biopsy of kidney with therapy based on those results. Case needs nephrologist.