Hi, like you I have had thyroid problems since I was diagnosed at 21, I do have a strong family history of it and when I was tested for the Braca gene this was looked into as well however all data came back inconclusive,at present I am on 75mg of Thyroxine and 20mg of Tertroxin one day and then 10mg of tertroxin the next, I am drug sensitive so being on various kinds of chemo has meant very regular thyroid tests and several times my tertroxin medication had to be tweaked, I have read here of several ladies who also have thyroid problems and then subsequently gotten breast cancer, so these findings are very interesting, I know that if after a period of a few weeks of feeling unwell its time for another thyroid blood test,I also had a very severe bout of glandualr fever at 14 and then had 4 years of chronic fatigue from 2009 until four months before my breast cancer diagnosis in 2013, all of this time I was under a endocrinologist, STRESS I believe was the biggest contributing factor, years and years of continual stress and not looking after myself but looking after everyone else, so now that has all changed and with lifestyle changes I am in a better place that I have every been,thanks for the article I will show it to my oncologist and see what he thinks, my endocrinologist has recently retired and I have yet to find another one, so my oncologist receives all of my thyroid blood level readings, I believe that stress is responsible for so many things and it has taken a stage 4 metastatic breast cancer diagnosis to finally make me realize this, I might add that I had a diagnosis of early Ovarian Cancer when I was 29 but the genetic people believed that it had no bearing on my subsequent breast cancer, purely bad luck!!!
