CHEK2 and cancer: Other homologous recombination DNA damage repair (HR-DDR) genes associated with other cancer risks besides breast and ovarian, such as ATM (n = 9), BARD1 (n = 4), BRIP1 (n = 2), CHEK2 (n = 5), PALB2 (n = 5), RAD51C (n = 1), and RAD51D (n = 7), accounted for an additional 4% (33/769).