question: My 10 yr old sister just told my mom and myself (i am her older sister) that theres a lump in her left breast.Mind you her breasts have not been formed yet.And my mom and i felt it..and im very scared because breast cancer does run in my family..my grandma had it.and i know that it skips 1 generation.therefore its between my older sister,myself, and my little sister..please answer..