Hi Rachel, once determined that the cancer is of an “invasive” type, generally speaking, a lot of other tests are done as well. As my oncologist explained, he wanted to know the baseline numbers and test results that I was initially presenting with and from that viewpoint moving forward, he could monitor any changes including those caused by medication or treatment. I was similar to you- IDC, stage 2, grade 2 and had a lot of tests done initially. Stay in touch with this website as it has lots of knowledge from those who have already been there as well as those just starting on their journey and don’t be afraid to ask questions if unsure. Kind regards, Maree