72 female - had early stage breast cancer diagnosis 30 years ago - mastectomy for both breasts and then tamofexin. Last year diagnosed with Stage 3/4 estrogen positive breast cancer in lymph nodes/discovered a lump under my arm. I refused Chemo (due to my age)) so oncologist started on me Anatrolosa to shrink the cancer in nodes, worked very well - had surgery in FEB where they removed 27 nodes - 11 still showed cancer. For mop up in March had 16 treatments of radiation. Still taking the Anatrolosa. Recovery from surgery/radiation has been pretty easy and Anatrolosa side effects are just some joint stiffness. Now the oncologist is suggesting I take a CDK 4/6 - the 3 year treatment as a preventative. Given my age and the harsh side effect I am reluctant to take this drug. I am debating if in my case it is really necessary - looking for an alternative preventative medication - prefer to stay on the Anatrolosa as preventative. Any advice/input would be appreciated.