I hope your fil is by now on his road to recovery. My husband was diag in April 2003 and had a low anterior bowel resection in May 2003. After surgery, his surgeon explained to me that the primary tumor had grown out through the colon wall and attached itself to his bladder. He was able to scrape the tumor off the bladder during the resection. As a result of this, he had to keep the catheter in for a few days more than normal to take the pressure off the bladder and reduce risk of infection. He did not need to have a colostomy. After a few weeks (may have been a few months but we cannot remember now) his urine flow was pretty much back to normal.
In my husbands case, he was diag as stage 4 as he had mets to the liver. After chemo, liver resection, more chemo and radioT he has remained clear
........ v.good news for a stage 4er.
I would ask about treatment plans from his surgeon and also an oncologist but i guess you need to concentrate on his immediate recovery from this surgery. He will be very sore and find it difficult to move around especially untill his stitches or staples come out. But moving around and try to walk a little more each day will help his recovery and get him home quicker. It is really important not to overdo things though so from a practical point of view he will need a bit of help in the first month and less during the second month of recovery.
Please ask more questions as you think of them and we will all try and help you through this.
Good luck and best wishes for your fil.