Hormone Positive followed by Herceptin positive breast cancer.

Hi @jayjen, sorry to hear about your sister, I don't know how common this is but it sounds very similar to what happened to my aunt, my only relative who has had breast cancer. She was diagnosed at 60yo with er/pr +Ve breast cancer and had lumpectomy, chemo and radiotherapy, then 10 years later had her2 cancer in other breast, again had lumpectomy, chemo and herceptin. I think this was a big reason why when I got er/pr +Ve breast cancer at 41yo, I decided to have a double mastectomy.