I do not believe getting breast cancer is a reason to get your large intestine removed. Especially if your UC is well managed on Inflectra.
But it's an interesting question: does infliximab/inflectra increase our odds of getting a breast cancer? I found this on a search.
"Infliximab and newly diagnosed neoplasia in Crohn's disease: a multicentre matched pair study"
"Abstract - Background and aims
The widespread use of anti‐tumour necrosis factor α antibody (Infliximab) in Crohn's disease (CD) raises concerns about
a possible cancer risk in the long term. In a matched pair study, we assessed whether Infliximab is associated with an increased risk of neoplasia."
" Conclusion
In our multicentre matched pair study, the frequency of a new diagnosis of neoplasia in CD patients treated with Infliximab was comparable with CD patients who had never received Infliximab."
Source:
https://www.ncbi.nlm.nih.gov/labs/pmc/articles/pmc1856527/Also from that study
"Newly diagnosed neoplasias have occasionally been reported in clinical trials using Infliximab in CD, with a frequency similar to that expected in the general CD population."