I have to add to this thread - so not quite final like I thought above!
Recently I had to start taking Entocort EC (budesonide). Oh my gosh - huge, huge difference for the colorectal tract post radiation. I asked the doc about it (that wasn't the reason I started to take it) and he thinks that basically the different foods that set off the digestive tract are because of radiation induced colitis. Entocort EC is a steroid that isn't systemic - it bypasses the stomach and is absorbed in the intestine. It has completely changed by bowel movement patterns and eating patterns. If you've read through this entire thread you know about tomatoes, chocolate, and leafy greens setting my digestive system off. So, now, here is where I am with the Entocort EC:
Sample menu and bowel movement day after I realized the change:
Breakfast - shredded wheat with berries and milk
Lunch - Large mixed green salad with lots of tomatoes, leafy greens, onions, dried fruit, and asparagus
Dinner - Fish, sauteed kale and spinach with onions, sweet potato, triple chocolate cake
One - yes only ONE - bowel movement - about one hour after dinner. I can't believe it.
So - if you are a ways out from takedown and experiencing ongoing urgency and frequency with diarrhea tendencies, you may want to discuss the possibility of Entocort EC with your docs (the gastro docs might be the most familiar with it). It is expensive but I LOVE being able to basically eat unlimited amounts of tomatoes and green leafy vegetables again.