CKD in just one kidney. Chance of spreading?

[Rob31679]

Hi everyone,

My girlfriend has been diagnosed with stage 3b kidney disease in one of her kidneys, with a GFR of 45. She's 23 years old.

Her consultant says the other kidney is fine, but that there is a higher risk than normal that she'll get it in that kidney as she's susceptible to it.

I've read that CKD usually affects both kidneys. Does anyone else have it in just one? What's the likelihood of it spreading? Does only having it in one kidney mean a better outlook?

Thanks a lot