Help please

Hormonal therapy works two ways - Tamoxifen is usually given to pre-menopausal women (and some post-meno) and it works by allowing circulating estrogen to continue, since it does positive things like protect heart and bones in younger women, but it blocks the receptors on breast cells.  Aromatase inhibitors, like Letrozole suppress the conversion of androgen to estrogen by inhibiting the enzyme aromatase that assists in this conversion.  This mechanism suppresses any remaining estrogen that would fuel the estrogen receptors on breast cells.  It is breast cells that travel in the body and set up shop to form a metastasis distantly.  If you take hormonal therapy for a number of years it provides protection for some period following the cessation of the therapy.  Recent studies are now pointing toward taking hormonal therapy for a longer time period, these studies for Tamoxifen have been put into practice, still being studied for AI drugs.  Some post-meno women are starting on Tamoxifen and switching to AI to stretch out this time, and some are doing the reverse.

i am sorry to be the voice of doom, but no treatment kills cancer stem cells and it is these that can create cancer elsewhere. However our own immune systems can inactivate them if given enough resources and known fuel for these cells, such as oestrogen, are blocked from reaching them so the growth triggers for metastases are starved.  I am being very untechnical deliberately, if you go on Youtube you can see cancer cells being destroyed by our own natural killer cells.  Exercise, good diet, good breathing, joy in life are all things that help boost our resources to destroy cancer cells, we are more powerful than any one treatment. But standard treatments can reduce tumour load allowing our immune systems to work