Kate
My motherinlaw had the surgery 3 weeks ago (I believe her size was 5 cm) and kept it from her kids they told us after she had the surgery done. The survival rate is 98 % if you have the surgery. It is only when it ruptures that the rate significantly decreases. I vote you have the surgery. Wow you've been through a lot. My mother inlaw has had the same traumatic 4 years surviving colon cancer and she has survived this too. God bless