2013). This study identified one type of MSH6 germline mutation in ovarian cancer cases. Unlike Lynch syndrome, mutations in MSH2 and MLH1 genes were not observed in our study. Walsh et al. (2011) also reported mutations in MSH6 but not in MLH1 or MSH2 in ovarian cancer patients. Collectively, it is possible that MSH6 among the mismatch repair genes was strongly associated with ovarian cancer. This evidence concerns the gene MLH1 and ovarian cancer.