Hello

I have a a mastectomy in December 2015, had chemo and radio, and am letrozole. So far so good for me. I have always wondered if I should have a Pharma cogenetic test. I’m not sure if these tests are undertaken when first diagnosed, so i’m not really sure if the cancer does return could treatment be more targeted, rather than  a one size fits all method. 

Your thoughts please.

Linda