Hello @rachelg1701c this is a rare breast cancer but I did find a study. The national library of medicine has a very small study of 12 cases.
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6965980/
I would love to sum up the technical and give you my take away. The final sentence of the abstract gives great hope, here it is.
“ In conclusion, ICC, as a special type of breast cancer, has its unique clinicopathological and immunophenotypic characteristics, leading to a good prognosis.”
They did mention it being treated similar to IDC, are they recommending a treatment plan for you?