Hi, I am so sorry to hear that your son is unwell
IgA nephropathy is a type of inflammatory disease of the glomeruli (parts of the kidneys).The inflammation of the glomeruli is called
glomerulonephritis and IgA is the most common type in the world. IgA nephropathy is characterised by deposition of IgA antibodies (antibodies are normallly used by your body to fight infection and disease).
The disease is highly variable and can range from no symptoms to rapidy progressing.
The treatment involves monitoring your son's urine for protein or blood, blood pressure control to prevent the blood pressure from causing further damage (some blood pressure medications would also reduce the proteins in the urine, steroid use,
low protein diet.
Poor Prognosis is usually determined by: persistant hematuria (blood in the urine), persistant
proteinuria, sustained
high blood pressure, impaired renal function,smoking. Some histological findings (what is seen in biopsy) can also affect outcome.
It is unlikely to affect the kidneys differently.
I hope that your son improves