He may create a bypass system that allows urine to flow directly from your kidneys to a plastic bag on the outside of your body. This is done by creating a tube that attaches to your ureters to an opening in your abdomen.
Alternately, he may create a new reservoir that is attached inside your pelvis. This will allow you to control when you urinate. If your urethra is intact, you will urinate much like you did before your surgery. If your urethra was removed, the reservoir will be attached to a thin tube through an opening in your abdomen.