I was told IDC is the most common breast cancer. There are a lot of factors that go into what your prognosis is. What size? What stage? ER/PR + or -? Node involved? Her2 + or -? I was diagnosed in 11/22 with IDC stage 1 with 4mm tumor, 8mm clear margins, no nodes positive, ER/PR+, Her2-. I don't have the genes for breast cancer. I chose a lumpectomy, 3 weeks of radiation and I'm taking Anastrozole for the next 5 years. I can also share with you that my younger sister was diagnosed with IDC in 2018 and just had her 4 year scan and is cancer free.