CHEK2 and triple-negative breast carcinoma: It can occur as a consequence of epigenetic modifications of BRCA 1/2 and/or mutations in various proteins crucial to HR pathways such as RAD51, RAD54, DSS1, RPA1, ATM, CHK2 and PTEN and has been related to several malignancies including triple-negative breast cancer and sporadic serous ovarian cancer [13-15].