@Sylviequebecbc
I am sorry to hear this for you. As you know we have the same type and almost the same stage diagnosis except yours was B and mine was C when found. I have had all treatments you have had as well. In my case, I was told I was inoperable unless its an emergency due to risk of spread and complications of surgeries they would have to do.
I believe the ultimate question you must ask yourself is "How do you want to live and what does quality of life mean to you?" Once you have thought about that and answered it honestly with yourself, you will know the answer. In the meantime, it is very scary. We know what surgery looks like and how it feels to recover from it. Are you aware of what the risks are they are mentioning when 'many bowel resections' and 'fascia removed'? If not, ask. It is not an easy thing to comprehend. The ostomy itself was terrifying to me when I was presented with possibly emerging from surgery with one initially. Thankfully they did not need to do one. It was the fact that I would have to not only face healing from the surgery but also dealing with an ostomy and how to live with it. In my case the risks of surgery also include a high probability of material entering the abdomen and causing infection and/or death. The risk of spread is very high as well for myself. I am not painting a pretty picture but want you to know the reality of some of what it looks like so you can ask the appropriate questions.
In my case, I have decided that if the oral drug, Letrozole, is not working anymore then I am done. I will live my life the way I am and manage until I can't. I am currently in a lot of pain and we are seeking out why. Bloodwork shows no kidney failure yet and gave a urine sample last week. I have an ultrasound tomorrow. Guesses are it is my hydroureteronephrosis which is worsening and will mean I will need a nephrostomy. I also know that if I choose to do nothing and my kidneys go into failure it will be 24-72 hours before death. So a nephrostomy is not pleasant, changes my quality of life but will still have most of it to continue on. If they told me some of this was coming from my colon (where I have already had a bowel anastamose), they would have to convince me pretty hard to have surgery if they even suggested it. I want to spend the time I have with my family doing things I like to do until I can't. I know the time in the hourglass are running thin but hope I have more than I think. My choices are as long as I am not in a lot of pain, can maintain conversations and function mostly normally for as long as I can it is what I want. I have thought long and hard about all of this and is why I have been doing a lot of reading on death and dying. You need to decided what your picture looks like, where your 'line' is and what you have done. It is your decision to make, not your family or friends or even what we say. You MUST be positive in the choice you make, the risks and benefits and be solid in that decision.
You will do it and be kind to yourself. You are scared and don't have all the answers yet. If the answer came back tomorrow that the oncologist said 'no the operation is not reasonable'; would that make you feel relieved? If so, you know the answer, you must then accept it and be at peace with it.
I am with you 100% for this journey. If you are feeling anything and want to talk at anytime day or night, write here. We will help you along your journey. It is a difficult and heart wrenching journey individual to all of us with some similarities. Only you walk your walk but we can join beside you.