How would you manage a young premenopausal woman with hormone receptor-positive micrometastatic breast cancer in two axillary lymph nodes, but with only DCIS on breast surgical pathology?  

Patient is 32-year-old premenopausal woman with extensive DCIS s/p b/l mastectomy without invasive component identified on surgical pathology, but with micrometastatic disease in 2/6 axillary lymph nodes, ER 91-100%, PR 91-100%, HER2 negative (1+ IHC).