@garu26 Welcome to Mayo Clinic connect. i see that you have posted this question in both the "kidney and bladder" and "blood cancer" support groups.

Here is what the Merck Manual has to say about this condition: https://www.merckmanuals.com/home/kidney-and-urinary-tract-disorders/disorders-of-kidney-tubules/fanconi-syndrome

I don't know where you are located. A large teaching hospital associated with a university is a good place to go, or of course, Mayo Clinic [three location in the United States: Rochester, MN; Jacksonville, FL; Scottsdale, AZ].
Ginger