iam scheduled to start immunotherapy next wed,however iam very concerned, worried about colitis or any side effects of bleeding, because I was only 6yrs young when I had a diverticulitis that older people usually get, then in 98 had bleeding ulcer coderized and in 03 another bleeding ulcer coderized, so I feel the odds are bad and just unsure, my pet scan is this Wed so if the cancer has not spread any farther than my neck I will ask my surgeon to talk about surgery first then immunotherapy second, the surgeon wanted to try to shrink the tumor first and I understand that except with my bleeding history, so any advice, knowledge, information, prayers, I will appreciate that thanks ed.