Anastrozole reduces the oestrogen in body. My breast cancer was oestrogen positive. I really don’t understand why you didn’t have any treatment and then you were out on Anastrozole. I think you need to find out why. A very good friend of mine here in UK had breast cancer 17 years ago and didn’t have any form of treatment, meds, radiotherapy or chemo. This time last year she discovered she had cancer in her spine. Now I don’t know fir sure, and I doubt if any doctor would either, that this was secondary cancer as it could b a new cancer completely, but it’s a bit of a coincidence, to me, that she didn’t have any treatment and then gets a shock like this. I’m not saying this to frighten you, as we are all in the same boat, but I think you should have a second opinion. Xx