Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) BRCA1 hereditary breast and ovarian cancer syndrome ?
    ### Response:
    BRCA1 hereditary breast and ovarian cancer syndrome (BRCA1 HBOC) is an inherited condition that is characterized by an increased risk for a variety of different cancers. Women with this condition have a 57-60% risk of developing breast cancer, a 40-59% risk of developing ovarian cancer and an 83% risk of developing contralateral breast cancer by age 70.
    