What is hydronephrosis?!
Question:
What is hydronephrosis?
Answers:
Hydronephrosis is distention and dilation of the renal pelvis, usually caused by obstruction of the free flow of urine from the kidney.
Hydronephrosis is a "stretching" or dilation of the inside or collecting part of the kidney. It often results from a blockage in the ureter where it joins the kidney that prevents urine from draining into the bladder. Urine is trapped in the kidney and causes the kidney to stretch. Hydronephrosis may also be due to abnormal backwash or "reflux" of urine from the bladder. In infants the amount of hydronephrosis may appear greater than the actual degree of blockage because of the "stretchiness" of the young tissues.