Prayer request

Tomorrow my Grandpa is going to have surgery. He's been cancer-free for between 7 and 10 years I believe. But last month, they told him his cancer had returned. He has 3 cancerous spots in his bladder, but the surgery should be able to remove them. Please keep him in your prayers, that the surgery might be successful, and God will direct the hands of the surgeons who do the operation.
*Update on Monday morning*
Another prayer request. Mari called me this morning, and Heather is in the hospital. She will be having an emergency appendectomy sometime today.