Fig. 1From: Late testicular relapse two decades after primary extragonadal germ cell tumor with uncommon metastases: a case reportHistopathological findings of the primary retroperitoneal extragonadal germ cell tumor show the characteristics of teratoma for hematoxylin and eosin (HE) staining (a ×100) and yolk sac tumor for HE staining (b ×200); the site of the yolk sac tumor was positive for alpha-fetoprotein (AFP) immunostaining (c ×200).Back to article page