Interestingly, two out of eight patients diagnosed with precancerous EIN (endometrial intraepithelial neoplasia) carried a PV in BRCA1. Unfortunately, the histologic subtypes of endometrial carcinomas other than endometrioid were rarely represented, thus the frequencies of PVs in these subgroups cannot be calculated and compared. This evidence concerns the gene BRCA1 and Endometrial Intraepithelial Neoplasia.