@Pahill Thanks hon. I lost 5kgs before diagnosis and 15 since. Nothing like a health 'scare' to overhaul one's life!
Re genes, I think there are nine genes that have been identified as directly linked to breast cancer. The BRAC1 & 2 are the most common and well known, but still small. For women with breast cancer it's 3% who have it. The other genes are incredibly rare.
In my instance, my breast surgeon put it like this: one person in a family is bad luck, two people is really bad luck and maybe a coincidence, but three people is no coincidence at all, there is something going on.
My sister had the genetic testing done on four of the genes before she died. No new tests have been developed since then, but I had a really good and informative chat with a woman at the Familial Cancer Centre. She sent me a letter which contained this:
"It is unlikely the genetic testing has missed a mutation (fault) in the genes tested, as the analysis is thorough. There is a small possibility you could have a mutation in another high risk gene that we have not tested although such genes are very rare. It is more likely that your personal and/or family history is due to a large combination of genes that each add a small element of cancer risk. This is called a polygenic (many gene) pattern of inheritance. Research is still trying to identify what these other genes are and how to test for them."
I hope this helps. Take care. K