BRCA1 and ovarian cancer: Studies have also shown a difference between BRCA1 and BRCA2 mutations and patient survival in epithelial ovarian cancer, with patients with BRCA2 mutations having a better prognosis than those with BRCA1 mutations.[10] In addition to pathogenic mutations in the BRCA2, there are also multi-base locus mutations and single nucleotide mutations[11]; however, the relationship between such mutations and ovarian cancer is still not fully understood.