Also, the loss of ARID1A-encoded protein BAF250a (a subunit of the Brahma-associated factor [BAF] nucleosome remodeling complex) was recorded as a frequent event in both ovarian clear cell and endometrioid carcinomas or in endometriosis-associated ovarian carcinomas [14,17,18]. This evidence concerns the gene ARID1A and endometrioid adenocarcinoma.