Significantly higher levels of linoleate (18:2 n6) and dihomo-γ-linoleate (20:3 n6) in ovarian cancer cell lines might indicate the subsequent desaturation of linoleate (catalyzed by delta-6-desaturase) followed by its further elongation to dihomo-γ-linoleate (catalyzed by elongase-5) (Additional file 7: Figure S4). This evidence concerns the gene FADS2 and ovarian carcinoma.