BRCA1 and endometrial serous adenocarcinoma: Similarly, further studies have discovered that BRCA1 level was a prognostic biomarker of poor survival in some solid tumors patients, including NSCLC [20, 21], ovarian cancer [22, 23], hepatocellular carcinoma [24], uterine serous carcinoma [25], and nasopharyngeal carcinoma [26, 27].