Are Her2+ and ER+ hereditary?

[energystar]

Does anyone know about this? I am curious.
My sister (who is 50) was given birth control pills for some reason, I think because her periods are irregular and she was going on a second honeymoon. I was upset, because it did not seem too smart, given her family history. She only took them for 1 month.
Burt I have had this question ever since-

My question is: do these conditions run in families?