Https://www.mayoclinic.org/healthy-lifestyle/fitness/in-depth/fitness/art-20048269
It is detected through the laboratory testing
The kidneys filter the blood to remove waste products, which they convert into urine. Urine is carried from each kidney, through a tube called a ureter to the bladder, where it is stored. The ureter and blood vessels enter and exit the kidney through the renal hilum.
That is called a sprain, as in spraining your ankle
