I've had kidney problems for years (kidney
my urologist surmised that 19 years worth of x-rays, CT-scans, procedures, trauma, etc, did the trick. Exposing the kidney to a lifetime of crappiness, radiation, 200+ stone removal procedures, blah,blah, blah... my poor kidney subsequently became "cystified" (I made that word up... you like?!?).
My urologist performed a "Renal Cyst Decortication". Think of a cyst kind of like a blister.