Events in other genes previously reported as mutated in EnOC or endometrial cancer were identified at lower frequency, including FBXW7m (14 cases, 12.5%), KMT2D/MLL3m (12 cases, 10.7%), BRCA1/2m (14 cases, 12.5%) (Supplementary Table 1), PIK3R1m (10 cases, 8.9%), MTORm (7 cases, 6.3%), POLEm (7 cases, 6.3%) (Supplementary Fig. 3B), APC (6 cases, 5.4%) and PPP2R1Am (4 cases, 3.6%) (Fig. 3a and Supplementary Fig. 1). Here, BRCA1 is linked to endometrial cancer.