I think this describes two related aspects:
Reflux Nephropathy
Reflux nephropathy is based on persistent reflux of sterile or infected urine from the bladder to one or both kidneys via the ureters.
The infection resulting from this ailment causes scaring, which is the nature of the following pathology:
FOCAL SEGMENTAL GLOMERULOSCLEROSIS
The term was not spelled correctly in the first post.