Her2/ most inherited type of BC?

Hello,

I was reading through some of the old posts and someone had written that this is the most inherited type of BC. Is this true? My mom's onc. nurse told her to tell me to be v. careful cause she said her2 tends to run in families. I am 30 and have already had a baseline mammogram. I would like to know if someone has read any articles relating to this.

Thanks,
Anne