Mediastinal NeoplasmsEndodermal Sinus TumorNeoplasms, Germ Cell and EmbryonalGerminomaTesticular NeoplasmsGerm CellsSeminomaDysgerminomaTeratomaGranulosa Cell TumorGiant Cell Tumor of BoneRetroperitoneal NeoplasmsGiant Cell TumorsCarcinoma, EmbryonalTestisSertoli Cell TumorGranular Cell Tumoralpha-FetoproteinsSpermatogenesisLeydig Cell TumorBleomycinCisplatinTumor Markers, BiologicalEtoposideChoriocarcinomaMesonephromaOvarian NeoplasmsRetroperitoneal SpaceSeminiferous TubulesSpermatozoaIfosfamideAntineoplastic Combined Chemotherapy Protocols