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Hi Anne,
From what I learned the other day from my genetics counselor, (sorry guys but we talked about everything) HER2 is an oncogene that everyone carries. At present they don't know why some peoples HER2 goes nuts and causes cancer and others live harmonously with it.
I myself feel that is does, at least in my family.
If it only happens in 30% of breast cancers, my family is at 50-75%. But then again I am no scientist.
Anne, if I find any supporting articles for it being hereditary, I will post them. Good question. Take Care k
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