I am 65. Was diagnosed in 2016. Stage 2A IDC ER PR positive and HER2 negative. Another primary tumor was detected on the same breast ( invasive lobular carcinoma) so my oncologist decided to have a neo adjuvant treatment plan for me. For 6 months I took 3 tablets of Ribociclib for 21 days rest for 7 days and then resume. I also take Letrozole continuously. The combines pills shrunk my tumor from 2.9 cm to 1 cm. I just had a mastectomy three weeks ago. I will continue to take these medicines for 6 more months. Then Letrozole alone for 2 years. In between I will have to undergo blood tests, Denosumab injections ( once a year) and PET Scans.