HMGA1 and yolk sac tumor: LDH,AFP, HCG HMGA1/2 (Embryonal carcinoma and teratoma) HMGA1 (Yolk sac tumor) OCT3/4 (Embryonal carcinoma) SOX2 (Embryonal carcinoma and yolk sac tumor) SOX17 (Embryonal carcinoma) Circulating mitochondrial DNA p53 and MIB-1