ANATOMY

Detailed explanation-1: -Hydronephrosis occurs when a kidney has an excess of fluid due to a backup of urine, often caused by an obstruction in the upper part of the urinary tract.

Detailed explanation-2: -Hydronephrosis is usually caused by a blockage in the urinary tract or something disrupting the normal workings of the urinary tract. The urinary tract is made up of the kidneys, the bladder, the ureters (the tubes that run from the kidney to the bladder) and the urethra (the tube that carries urine out of the body).

Detailed explanation-3: -Most people with hydronephrosis will have a procedure called urinary catheterisation to drain the urine from their kidneys. Depending on the underlying cause, medication or surgery may be needed afterwards to correct the problem.

Detailed explanation-4: -Hydronephrosis (kidney swelling) occurs as the result of a disease. It is not a disease itself. Conditions that may lead to hydronephrosis include: Blockage of a ureter due to scarring caused by prior infections, surgeries, or radiation treatments.