Final answer:
Incomplete emptying of the bladder due to bladder outlet obstruction can cause hydronephrosis.
Step-by-step explanation:
Incomplete emptying of the bladder due to bladder outlet obstruction can cause hydronephrosis. Hydronephrosis is the enlargement of one or both of the kidneys caused by obstruction of the flow of urine. It occurs when urine cannot drain out of the kidney and builds up in the urinary tract. This can lead to kidney damage and other complications.