A family history of breast cancer, particularly in a mother, daughter, or sister.

It wasn't so clear why the men were interested in her sisters.

I knew he was interested in my young sister, Anna.

Edward was very interested in his new sister and brother.

"And everything is so simple, really," put in her sister.

A similar mutation has been reported in a human brother and sister.

Breast cancer in a father, mother, daughter, sister or brother strongly increase a woman's risk.

Elaine keeps saying that they cut a hole in her sister.

In the past, she and her twin sister Elaine fought for the attention of their mother.

Gerald got forty years in prison, his mother and sister up to twenty.