We tested eight serum biomarkers (carcinoembryonic antigen, α-fetoprotein, fibroblast growth factor, chorionic gonadotropin, vascular endothelial growth factor, lactate dehydrogenase, alkaline phosphatase, and cancer antigen-125) as well as cancer protein and microRNA arrays for their ability to detect teratomas and analyzed their correlations with teratoma size. Here, VEGFA is linked to teratoma.