Do you utilize Oncotype DX DCIS score to decide on the need and duration of endocrine therapy in patients with DCIS?  

There is not enough data to use Oncotype Dx DCIS score routinely in practice and I personally don’t use it. Certainly, in patients with DCIS who get a simple mastectomy, it has no applicability since mastectomy is the definitive therapy for DCIS. In patients with lumpectomy, adjuvant breast ...