I've never heard of a diagnosis of nephrosis simply by doing an ultrasound. It's always determined through a biopsy as far as I know.
I was diagnosed with nephrosis (aka minimal change disease) as a baby and I'm now 52. A biopsy that I underwent 20 years ago changed the diagnosis to focal segmental glomerulonephritis.
The condition is not curable but routinely treated with prednisone. Fortunately for you and your son, there are some new and exciting drugs out that may help stretch the time between episodes. Although I had a really rough childhood, I'm still here and doing well, although 50 years of steroid use has taken its toll.
I hope all works out for your son. If he is like most with the condition, he'll live a good life with some bumps along the way.
Post Edited (MarcJ) : 11/16/2012 3:44:42 PM (GMT-7)