How would you approach adjuvant therapy for a post-menopausal women with cT2 cN0 TNBC on biopsy s/p neoadjuvant chemotherapy and mastectomy who is later found to have RCB2 HR+ breast cancer on surgical pathology?  

First, is she BRCA positive? If so, there is a role for olaparib in adjuvant setting (OlympiA trial). I would treat with capecitabine as per the CREATE X trial (Masuda et al., PMID 28564564). Although the subset of triple negative cancers benefited most, and the point estimate for the ER or PR posit...