BRCA1 and ovarian cancer: In a group of ovarian cancer G1 patients, statistically significant association with cancer risk was detected for mutations in BRCA1 (OR = 8.53, p = 0.005) and PALB2 (OR = 7.03, p = 0.03) genes; however, it should be noted that the number of mutation carriers was very limited (4 cases with BRCA1 and 2 cases with PALB2).