All benign cystadenomas and normal ovarian surface epithelium (n = 35) display undetectable to very low FASN staining (mean  score = 0) whereas ovarian carcinomas of various histologic subtypes show FASN immunoreactivity (mean  score ≥ 1) in most cases (Figures 2(c) and 2(d)). This evidence concerns the gene FASN and cystadenoma.